Pennsylvania: Your Gateway to International Travel Health

A complete guide for Pennsylvania-based travelers preparing for international trips — vaccines, regulations, clinics, and world-class expert resources across the Keystone State.

State of Pennsylvania, USA Vaccines & Travel Health International Travelers Updated 2025–2026

Pennsylvania & International Travel Health

Pennsylvania — the Keystone State — occupies a central position in American life, history, and medicine. Home to Philadelphia, one of the nation's oldest and most internationally connected cities, and Pittsburgh, a transformed global innovation hub, Pennsylvania is anchored by two of the most prestigious healthcare ecosystems in the United States. Penn Medicine (University of Pennsylvania Health System), Jefferson Health, Temple University Health System, and the Children's Hospital of Philadelphia (CHOP) — ranked the #1 children's hospital in the nation — define Philadelphia's world-class medical landscape. In Pittsburgh, UPMC (University of Pittsburgh Medical Center) — one of the largest health systems in the world — delivers equally exceptional care. Between these two anchor cities, a rich network of regional academic centers including Penn State Health in Hershey and Geisinger Health in Danville extends excellence statewide.

Whether you are departing from Philadelphia International Airport (PHL) — the East Coast's major international hub — Pittsburgh International Airport (PIT), Lehigh Valley International Airport (ABE), Harrisburg International Airport (MDT), or Wilkes-Barre/Scranton International Airport (AVP), your travel health preparation begins in the Keystone State. This guide covers Pennsylvania's vaccine regulations, routine immunization priorities, travel-specific vaccines, and the principal clinics and hospitals providing expert travel medicine services from Philadelphia and Pittsburgh to Allentown, Harrisburg, Erie, and beyond.

Dual World-Class Medical Ecosystems Penn Medicine & Jefferson in Philadelphia; UPMC in Pittsburgh
Full Vaccine Menu Every travel vaccine available at major centers statewide
Expert Consultations World-renowned infectious disease & travel medicine specialists
PADOH Oversight PA Department of Health manages immunization via PA-SIIS registry

Healthcare in Pennsylvania for Travelers

Pennsylvania's travel health ecosystem is among the finest in the United States — anchored by two distinct world-class medical corridors. In Philadelphia, Penn Medicine's Hospital of the University of Pennsylvania, Thomas Jefferson University Hospital, and Temple University Hospital each operate acclaimed infectious disease and travel medicine programs. In Pittsburgh, UPMC Presbyterian — the flagship of one of the world's largest integrated health systems — provides equally comprehensive travel medicine services. Statewide, Penn State Health Hershey, Geisinger, Lehigh Valley Health Network, and UPMC Hamot in Erie ensure broad geographic access to quality travel health preparation.

 State Health Authority

The Pennsylvania Department of Health (PADOH) Immunization Program oversees vaccine policy, maintains the Pennsylvania Statewide Immunization Information System (PA-SIIS), and coordinates Yellow Fever Vaccination Center certification across the state. School immunization requirements are governed by the Pennsylvania School Code, 24 P.S. § 13-1303a and Pennsylvania Code Title 28, Chapter 23.

PADOH Immunization

 World-Class Academic Centers

Penn Medicine and Jefferson Health in Philadelphia are internationally recognized leaders in infectious disease and travel medicine. In Pittsburgh, UPMC — one of the largest health systems in the world — operates a comprehensive travel medicine program. Penn State Health Milton S. Hershey Medical Center serves as the statewide academic resource for Central Pennsylvania.

Penn Medicine Travel

 Private Travel Clinics

Passport Health operates multiple CDC-certified Yellow Fever vaccination clinics across Pennsylvania — in Philadelphia, Pittsburgh, Harrisburg, Allentown, and State College — providing convenient destination-specific travel vaccine consultations for all traveler types throughout the Keystone State. PADOH county and district health offices supplement statewide access.

Passport Health PA
 Plan Ahead: All travel health providers in Pennsylvania — including county health departments — require an appointment for travel vaccines. Book at least 4–6 weeks before departure. Penn Medicine and Jefferson Health travel medicine programs in Philadelphia are among the busiest in the eastern United States and can have wait times extending beyond six weeks during peak summer travel season. Travelers requiring multi-dose series (rabies pre-exposure, Japanese Encephalitis) need multiple appointments spaced weeks apart — factor this into your pre-travel timeline.

Vaccine Regulations in Pennsylvania

Pennsylvania's school immunization requirements are governed by the Pennsylvania School Code, 24 P.S. § 13-1303a and Pennsylvania Code Title 28, Chapter 23 — the Department of Health's school immunization regulations. Here is what travelers — and parents of young travelers — need to understand about the Keystone State's vaccine framework.

 School Entry Requirements

Under Pennsylvania law, children attending public, private, or parochial school must present proof of required immunizations or a valid exemption before enrollment. Required vaccines include DTaP/Tdap, Polio, MMR, Varicella, Hepatitis B, Hepatitis A (for childcare/pre-K), and MenACWY (for 7th grade entry). The PA-SIIS registry allows schools and providers to verify immunization status statewide, including cross-state record retrieval.

 Exemptions Permitted

Pennsylvania grants exemptions for medical and religious grounds under 28 Pa. Code § 23.84. Medical exemptions require documentation from a licensed physician. Religious exemptions require a signed statement from a parent or guardian objecting on religious grounds. Pennsylvania does not recognize philosophical or personal belief exemptions, placing it among states with a more structured exemption framework that balances individual choice with community health protection.

 International Entry Requirements

Pennsylvania does not impose vaccine mandates for residents traveling internationally beyond school requirements. However, destination countries enforce independent legally binding entry conditions. Yellow fever vaccination (ICVP Yellow Card) is required for many sub-Saharan African and South American countries. Philadelphia is a major international hub — PHL serves direct routes to Europe, Latin America, the Caribbean, and beyond — making destination-specific travel health preparation especially important for Keystone State residents.

 For International Travel: The PADOH Immunization Program recommends reviewing your complete PA-SIIS immunization record before any international trip. Your Penn Medicine, Jefferson, UPMC, or Passport Health provider can access and review your vaccination history at your pre-travel consultation. Check all destination-specific requirements at the CDC Travelers' Health portal and at your destination country's official health authority or U.S. embassy website well before your departure.

Routine Vaccines for Children in Pennsylvania

Pennsylvania's childhood immunization schedule follows the CDC/ACIP (Advisory Committee on Immunization Practices) recommended schedule. The PADOH Immunization Program works with an extensive network of pediatric providers — including the nationally ranked Children's Hospital of Philadelphia (CHOP) and UPMC Children's Hospital of Pittsburgh — to promote on-schedule vaccination statewide. Pennsylvania's dense urban and suburban communities, combined with strong academic pediatric medicine, give the state an excellent foundation for childhood immunization coverage.

 School Entry Mandate: Children entering Kindergarten in Pennsylvania must have documented doses of DTaP, Polio, MMR, Varicella, and Hepatitis B. Children in childcare and pre-K additionally require Hepatitis A and Hib. Children entering 7th grade must receive the Tdap booster and MenACWY vaccine. Requirements are enforced under 24 P.S. § 13-1303a and 28 Pa. Code Chapter 23. Medical and religious exemptions are available; philosophical exemptions are not recognized under Pennsylvania law. Schools must report annual compliance data to PADOH, and unvaccinated students without valid exemptions may be excluded during declared outbreaks.
Vaccine Disease(s) Prevented Typical Schedule Notes for Travelers
DTaP / Tdap Diphtheria, Tetanus, Pertussis 5 doses by age 6; Tdap booster at 11–12 Pertussis outbreaks occur globally; confirm current status before any international trip
Polio (IPV) Poliomyelitis 4 doses by age 4–6 Some countries require proof of polio vaccination for entry or exit — Africa and Asia travel
MMR Measles, Mumps, Rubella 2 doses: 12–15 months & 4–6 years Measles is endemic across Europe, Asia, and Africa; Philadelphia has experienced measles cases — confirm 2 doses
Varicella Chickenpox 2 doses: 12–15 months & 4–6 years Required for PA school entry; immunity is important during international travel globally
Hepatitis B Hepatitis B virus 3-dose series: birth, 1–2 months, 6–18 months Critical for travel to Asia, Africa, and Eastern Europe with high HBV prevalence
Hepatitis A Hepatitis A virus 2 doses starting at 12–23 months Required for PA childcare entry; high priority for most international destinations
Hib Haemophilus influenzae type b 3–4 doses by 15 months Required for PA childcare; standard protection before international travel
PCV (Pneumococcal) Pneumococcal disease, pneumonia 4 doses by 15 months Protects against serious pneumonia — a significant risk in developing-country travel settings
Rotavirus Severe diarrheal disease 2–3 doses by 8 months Particularly relevant for travel to developing countries with limited clean water and sanitation
MenACWY (Meningococcal) Meningococcal disease A, C, W, Y 11–12 years; booster at 16 — required at 7th grade in PA Required for sub-Saharan Africa travel and Saudi Arabia (Hajj/Umrah)
HPV Human Papillomavirus / cervical cancer 2–3 doses starting at age 11–12 Maintain on-schedule vaccination regardless of travel; recommended through age 26
Influenza Seasonal influenza Annually from 6 months of age Southern Hemisphere flu season runs April–September — timing matters for South America and Southern Africa travel
COVID-19 COVID-19 From 6 months; updated annually 2024–2025 updated vaccine recommended by CDC; confirm destination documentation requirements before departure
 Pennsylvania's Children's Hospital of Philadelphia (CHOP) — ranked the #1 children's hospital in the United States — operates a world-leading pediatric travel medicine program. Families with children who have complex medical needs or are traveling to high-risk destinations should consider CHOP's Travel Medicine program for specialized pre-travel consultations. CHOP's team has global expertise in pediatric tropical medicine and has treated travel-acquired illnesses in children from virtually every destination on earth.

Routine Vaccines for Adults in Pennsylvania

📍 Pennsylvania Travel Health Centers & Major Hospitals

Click any marker to view details and get Google Maps directions. Orange = Travel Health Clinic  |  Blue = Major Hospital

Travel Health & Vaccine Clinic Major Hospital 🔍 Scroll to zoom  |  Drag to pan

Adult vaccine protection from childhood series can wane significantly, and adults face different risk profiles based on specific travel destinations and activities. Pennsylvania's exceptional concentration of academic medical centers means adult travelers across the state have access to the finest travel medicine expertise in the nation.

 Td / Tdap Booster

Every adult should receive a Td booster every 10 years. Adults who never received Tdap should substitute one Td dose with Tdap to protect against whooping cough. Particularly important for frequent international travelers, healthcare workers, and those visiting developing-world destinations where wound exposure and limited care access are concerns.

Every 10 years

 Influenza (Annual)

Annual flu vaccination is recommended for all Pennsylvania adults. The updated 2024–2025 vaccine is widely available at pharmacies, PADOH health offices, and hospitals statewide. Philadelphia International Airport's volume of international passengers from flu-endemic regions creates year-round exposure risk — annual vaccination is especially important for frequent international travelers.

Annual

 COVID-19 (Updated)

The 2024–2025 updated COVID-19 vaccine is recommended for all Pennsylvania adults. Available at pharmacies, PADOH offices, and hospitals statewide. Some international destinations may still require documentation of vaccination status for entry or transit — confirm your destination's current policy well before your PHL or PIT departure.

Updated annually

 Hepatitis A & B

Adults not vaccinated against Hepatitis A and B in childhood should complete both series before international travel. Both are high priority for travel throughout Asia, Africa, Latin America, and Eastern Europe. Pennsylvania's large diaspora communities — South Asian in Philadelphia suburbs, Eastern European throughout the state — often travel to high-prevalence regions for family visits.

Catch-up series

 Meningococcal

MenACWY is recommended for adults at risk and is legally required for Hajj/Umrah pilgrimage to Saudi Arabia — an important consideration for Pennsylvania's significant Muslim communities in Philadelphia and Pittsburgh. MenB is recommended for adults at increased risk and some college-age travelers. Both vaccines are widely available across Pennsylvania's travel medicine network.

Risk-based

 Pneumococcal & Shingles

Adults 50 and older should receive Shingrix (shingles vaccine) as a 2-dose series. PCV15 or PCV20 is recommended for adults 65+ and younger adults with specific health conditions. Pennsylvania's world-class academic medical centers are particularly well-suited to managing these vaccines for complex patient populations traveling internationally.

Age 50+
 Tip: Pennsylvania's two great academic medical corridors — Penn Medicine and Jefferson in Philadelphia and UPMC in Pittsburgh — are among the most capable travel medicine programs in the eastern United States. For complex multi-country itineraries, immunocompromised travelers, or rare specialty vaccines, these programs offer the depth of expertise and inventory to address virtually any travel health preparation need in a single comprehensive consultation.

The Three Categories of Travel Vaccines

Travel vaccines fall into three distinct categories. Understanding each is essential for any Pennsylvania traveler preparing for an international trip from PHL, PIT, or the state's regional airports. Your travel health provider will assess all three during your pre-travel consultation.

 1 — Routine Standard vaccines recommended for everyone in the U.S. by age — childhood series, annual flu, COVID-19. Must be fully up to date before any international trip. PA-SIIS records can quickly surface any adult gaps for your travel medicine provider to address at your pre-travel appointment.
 2 — Required Legally required by destination countries as a condition of entry. Yellow fever is the most common example. Without a valid International Certificate of Vaccination (ICVP Yellow Card) stamped at a CDC-certified facility, you may be denied entry or placed in quarantine — regardless of flying from a major hub like Philadelphia International.
 3 — Recommended Not legally required but strongly advised based on destination-specific health risks. Examples include Typhoid, Hepatitis A, Japanese Encephalitis, Rabies pre-exposure, and Cholera — all tailored to your itinerary by Penn Medicine, Jefferson, UPMC, or Passport Health specialists.
Travel Vaccine Category Key Destinations Notes
Yellow Fever Required Sub-Saharan Africa, tropical South America Penn Medicine, Jefferson, UPMC, and Passport Health (Philadelphia, Pittsburgh, Harrisburg) are PA's certified YF centers
Typhoid Recommended South Asia, Southeast Asia, Africa, Latin America Oral or injectable; available at all major Pennsylvania travel medicine programs and Passport Health locations statewide
Japanese Encephalitis Recommended Rural Asia, Southeast Asia 2-dose series; Penn Medicine, Jefferson, and UPMC are Pennsylvania's primary resources for this specialty vaccine
Rabies (pre-exposure) Recommended Asia, Africa, Latin America (remote areas) 3-dose series; advisable for adventure travelers, missionaries, and those working with animals internationally
Cholera (Vaxchora) Recommended Sub-Saharan Africa, South/Southeast Asia, Haiti Single oral dose for adults; available at Penn Medicine, Jefferson, and UPMC — confirm when scheduling
Meningococcal ACWY Required / Recommended Meningitis Belt (Africa), Saudi Arabia (Hajj/Umrah) Required for Hajj — relevant for PA's significant Muslim communities; strongly recommended for all Africa travel
Hepatitis A Recommended Developing countries worldwide Required in PA childcare; adults not vaccinated in childhood should catch up before any international travel
Malaria Prophylaxis Prescription Rx Sub-Saharan Africa, South/Southeast Asia, Central America Not a vaccine — prescription medication available from Penn Medicine, Jefferson, UPMC, and Passport Health statewide

Main Travel Health & Vaccine Centers in Pennsylvania

Pennsylvania's travel health resources span world-class academic programs in Philadelphia and Pittsburgh, strong regional academic centers in Hershey and Danville, private CDC-certified travel clinics statewide, and PADOH county and district health offices across all 67 counties. Below are the principal facilities providing travel health services and vaccinations across the Keystone State.

 Philadelphia / Southeastern Pennsylvania

 Penn Medicine — Travel Medicine Clinic  Nationally Top-Ranked Academic Program
 3400 Spruce St, Philadelphia, PA 19104
 (215) 662-4000  |   By appointment

Penn Medicine's Hospital of the University of Pennsylvania — consistently ranked among the nation's top academic medical centers — operates one of the most comprehensive travel medicine programs in the eastern United States. Penn's infectious disease and travel medicine specialists provide individualized pre-travel consultations, yellow fever certification, the complete range of travel vaccines including rare specialty vaccines, malaria prophylaxis prescriptions, and world-class post-travel illness diagnosis and treatment. A premier resource for complex itineraries, immunocompromised travelers, and any Pennsylvania resident requiring the highest standard of pre-travel preparation.
Yellow FeverTyphoidRabiesJapanese EncephalitisMalaria RxPost-Travel CareComplex Itineraries
 Jefferson Health — Travel Medicine  Philadelphia Institution
 111 S 11th St, Philadelphia, PA 19107
 (215) 955-6840

Thomas Jefferson University Hospital's Travel Medicine and Infectious Disease program is one of Philadelphia's most storied academic travel health resources. Jefferson's team provides comprehensive pre-travel consultations, all major travel vaccines, yellow fever certification, malaria prophylaxis, and post-travel illness evaluation — serving the Philadelphia metro and the densely populated Southeastern Pennsylvania region with deep clinical expertise.
Yellow FeverTyphoidRabiesTropical DiseasePost-TravelMalaria Rx
 Passport Health Philadelphia (Center City)  CDC-Certified Yellow Fever Center
 1601 Walnut St, Suite 1011, Philadelphia, PA 19102  |   (215) 569-7428
CDC-designated Yellow Fever vaccination center in Center City Philadelphia. Full travel vaccine inventory with destination-specific consultations for business travelers, leisure travelers, missionaries, and all traveler types. Conveniently located for Philadelphia International Airport (PHL) departures and for travelers throughout the greater Philadelphia metro area.
 Children's Hospital of Philadelphia (CHOP) — Pediatric Travel Medicine  #1 Children's Hospital in the US
 3401 Civic Center Blvd, Philadelphia, PA 19104
 (215) 590-1000  |   By appointment

The Children's Hospital of Philadelphia — ranked the #1 children's hospital in the United States by U.S. News & World Report — operates one of the nation's leading pediatric travel medicine programs. CHOP's travel medicine specialists are uniquely equipped to evaluate children with complex medical conditions, immunocompromising diagnoses, or special needs before international travel. CHOP's post-travel illness evaluation and tropical pediatric medicine capabilities are among the finest in the world.
Pediatric Travel MedicineYellow FeverComplex Pediatric CasesPost-Travel PediatricsWorld #1 Children's Hospital

 Pittsburgh / Western Pennsylvania

 UPMC Travel Medicine Clinic  Western PA's Premier Resource
 3708 Fifth Ave, Pittsburgh, PA 15213
 (412) 647-7228  |   By appointment

UPMC's Travel Medicine clinic — operated through one of the world's largest integrated health systems — is Western Pennsylvania's most comprehensive travel health resource. UPMC infectious disease and travel medicine specialists provide individualized pre-travel consultations, yellow fever certification, all major travel vaccines, malaria prophylaxis prescriptions, and expert post-travel illness evaluation for Pittsburgh, Allegheny County, and the entire Western Pennsylvania region. The definitive resource for complex itineraries and immunocompromised travelers in Western PA.
Yellow FeverTyphoidRabiesTropical DiseaseMalaria RxPost-Travel Care
 Passport Health Pittsburgh (Downtown)  CDC-Certified Yellow Fever Center
 4 PPG Place, Suite 430, Pittsburgh, PA 15222
 (412) 281-0844

CDC-designated Yellow Fever vaccination center conveniently located in Downtown Pittsburgh. Full travel vaccine inventory with destination-specific consultations for Pittsburgh's significant international business traveler community — including corporate travelers in the technology, healthcare, finance, and natural resources sectors with frequent international travel needs.
Yellow FeverTyphoidRabiesHepatitis A/BWestern PA / Pittsburgh Metro

 Harrisburg / Hershey / Central Pennsylvania

 Penn State Health Travel Medicine — Hershey  Central PA Academic Resource
 500 University Dr, Hershey, PA 17033
 (717) 531-8521  |   By appointment

Penn State Health Milton S. Hershey Medical Center — Central Pennsylvania's flagship academic Level I Trauma Center — operates the region's premier travel medicine program. Penn State's infectious disease team provides pre-travel consultations, yellow fever certification, all major travel vaccines, and post-travel illness evaluation for the Harrisburg, Hershey, Lebanon, and York corridor, as well as state government employees who frequently travel internationally on official business.
Yellow FeverTyphoidInfectious DiseasePost-Travel CareState Capital Region
 Passport Health Harrisburg  CDC-Certified Yellow Fever Center
 4905 Jonestown Rd, Suite 102, Harrisburg, PA 17109  |   (717) 652-7428
CDC-designated Yellow Fever vaccination center serving Harrisburg, Dauphin County, and South-Central Pennsylvania. Convenient option for capital region travelers who prefer a private travel clinic for their pre-departure vaccine preparation.

 Lehigh Valley, Scranton & Northeast Pennsylvania

 Lehigh Valley Health Network Travel Medicine
 1200 S Cedar Crest Blvd, Allentown, PA 18103
 (610) 402-8000  |   By appointment

Lehigh Valley Health Network — Northeastern Pennsylvania's primary Level I Trauma health system — provides travel health and immunization services through its Allentown campus. Serving the Allentown-Bethlehem-Easton metropolitan area, the Poconos, and the broader Lehigh Valley. Contact directly to confirm available travel vaccines and appointment scheduling. Northeastern PA travelers can also access Philadelphia's world-class programs via I-78 (approximately 60 miles).
Travel VaccinesInfectious DiseaseLehigh ValleyNortheast PA
 PADOH County and District Health Departments (All 67 Counties): Pennsylvania maintains PADOH-affiliated county and district health departments serving all 67 counties — including direct-service health departments in Philadelphia, Pittsburgh/Allegheny County, Allentown, Bethlehem, Erie, Norristown, Wilkes-Barre, and Scranton. These offices provide immunization services at public health pricing and can serve as a resource for travelers who need travel vaccines at more accessible cost. Contact your nearest county health office to confirm available travel vaccines and appointment requirements. The PADOH Immunization Program maintains a current statewide provider directory.

Pre-Travel Health Checklist for Pennsylvania Travelers

Follow this step-by-step timeline to ensure you are fully protected before departing from Pennsylvania on an international trip — whether from Philadelphia International, Pittsburgh, or the state's regional airports.

Timeframe Action Details
6+ Weeks Before Book a travel health consultation Contact Penn Medicine Travel Medicine, Jefferson Health, UPMC Travel Medicine, CHOP (for children), Penn State Health Hershey, Lehigh Valley Health Network, or Passport Health. Research destination requirements at CDC Travelers' Health. Philadelphia programs can book out 6+ weeks — plan early.
At Your Visit Bring your vaccination records Receive required and recommended vaccines for your destination. Get prescriptions for malaria prophylaxis if needed. Request your ICVP Yellow Card if yellow fever is legally required for your destination country. Ask your provider to review your PA-SIIS records to identify and address any gaps in routine adult vaccination history.
Follow-Up Visits Complete multi-dose series Rabies pre-exposure (3 doses over 21 days), Hepatitis A catch-up (2 doses), Japanese Encephalitis (2 doses), and Hepatitis B catch-up (3 doses) all require multiple visits. Pennsylvania's dense travel medicine network in Philadelphia and Pittsburgh makes completing multi-dose series particularly convenient compared to more rural states.
1–2 Weeks Before Confirm all travel health documents Verify your ICVP (Yellow Card) is correctly stamped, signed, dated, and uses an approved official stamp. Pack a travel health kit: oral rehydration salts, antidiarrheal medication, DEET insect repellent (30%+), sunscreen, and all prescription medications including malaria prophylaxis. Confirm sufficient supply for the full travel period plus buffer for any delays.
On Return Monitor for illness symptoms If you develop fever, rash, persistent diarrhea, jaundice, or unusual symptoms within weeks of returning to Pennsylvania, contact Penn Medicine Infectious Disease (Philadelphia), Jefferson Health, or UPMC Infectious Disease (Pittsburgh) immediately. Provide your complete travel history including every country visited, dates, activities, and any animal or insect exposures. Early diagnosis is critical for tropical diseases.
 After Your Trip: Pennsylvania's academic medical centers offer some of the world's finest capabilities for post-travel illness diagnosis and treatment. Penn Medicine and Jefferson Health in Philadelphia maintain world-class infectious disease and tropical medicine diagnostic laboratories. UPMC in Pittsburgh has internationally recognized expertise in infectious disease. If you develop unexplained fever, rash, jaundice, or neurological symptoms within weeks of returning to Pennsylvania from international travel, seek care at one of these centers immediately and provide your complete travel history — including destinations, activities, and any potential exposures. For children returning with illness, CHOP's infectious disease team is among the finest pediatric tropical medicine resources in the nation.

Ready to Travel from Pennsylvania?

Whether you're departing from Philadelphia International, Pittsburgh, Harrisburg, Allentown, or Erie — Pennsylvania's world-class travel health providers are ready to protect you. Start your pre-travel consultation at least 4–6 weeks before departure and travel with confidence from the Keystone State.

This article is for informational purposes only. Always consult a licensed healthcare provider for personalized travel health advice. Information current as of 2025–2026.