visa-admin
Updated 2026-09-17 5 min
In short
- ●Measles, once considered eliminated in the Western Pacific, is seeing a resurgence linked to falling vaccination coverage and disrupted health services.
- ●Cambodia maintains high vaccination coverage, but regional outbreaks are a reminder of the importance of vigilance at borders and in tourist areas.
- ●For expats in Siem Reap, the priority is to check the vaccination status of the whole family, especially children, and keep written proof of vaccinations.
- ●Cambodian health authorities are continuing catch-up campaigns, and expats can get vaccinated at public and private centers in the city.
Measles
Disease
Resurgence 2024-2026
Period
Western Pacific, including Cambodia
Region
Phnom Penh Post, Sept 17, 2026
Source
Key Facts at a Glance
- Disease. Measles, once considered eliminated in the Western Pacific region, is making a comeback.
- Cause. Falling vaccination coverage and disrupted health services since 2020.
- Region. Several Western Pacific countries are reporting cases, with a risk of cross-border spread.
- Cambodia. The country maintains high vaccination coverage but remains exposed to imported cases.
- Action. Check your vaccination status, especially for children, and get vaccinated if necessary.
How It Happened
Measles had declined thanks to decades of vaccination campaigns. Its resurgence follows a regional health timeline.
- 2000-2019: massive vaccination campaigns, measles declines sharply in the Western Pacific.
- 2020-2022: the COVID-19 pandemic disrupts health services and delays routine vaccinations.
- 2023: the first signals of falling vaccination coverage appear in several countries in the region.
- 2024-2025: measles outbreaks are reported, notably in the Philippines and other neighboring countries.
- 2026: the WHO and health authorities warn of the risk of regional resurgence.
- September 2026: the Phnom Penh Post publishes an analysis on the return of the disease and efforts to eliminate it again.
- Upcoming: catch-up campaigns and enhanced surveillance at borders and in tourist provinces.
Breakdown
The situation varies by population segment and geographic area.
| Segment | Figure | Detail |
|---|---|---|
| Global vaccination coverage (2 doses) | 74% | Below the 95% threshold recommended for herd immunity. |
| Coverage in Cambodia | High | The country maintains coverage above the regional average. |
| Unvaccinated expat children | Varies | Increased risk for families who recently arrived or have limited medical follow-up. |
| Border areas | Vigilance | Border provinces are most exposed to imported cases. |
| Siem Reap | Tourist city | High international traffic, but health infrastructure is available. |
What This Means in Practice in Siem Reap
- Check your children's vaccination records: two doses of MMR are needed for full protection.
- Adults born after 1957 should also check their status, especially if they haven't had measles.
- Vaccination centers in Siem Reap (public and private) offer the MMR vaccine, often at an affordable price.
- If fever and rash occur, seek medical advice promptly and avoid crowded places before diagnosis.
- Keep a digital copy of your vaccinations: useful for travel, international schools, and insurance.
How to Stay Safe
- Step 1: Gather vaccination records for the whole family and check MMR doses.
- Step 2: If a dose is missing, make an appointment at a vaccination center in Siem Reap.
- Step 3: For children under 5, seek pediatric advice before any regional travel.
- Step 4: Watch for symptoms (fever, cough, rash) for 10 to 14 days after traveling to an outbreak area.
- Step 5: If symptoms occur, isolate yourself and contact a doctor before going to a clinic.
- Step 6: Keep a digital copy of your vaccinations and your children's.
- Step 7: Follow recommendations from the Cambodian Ministry of Health and the WHO for updates.
Frequently asked questions
Is measles currently present in Cambodia?
Cambodia maintains high vaccination coverage but remains exposed to imported cases from neighboring countries. Vigilance is warranted, but there is no need to panic.
How many doses of MMR vaccine are needed for protection?
Two doses of MMR vaccine are recommended for full protection. The first is usually given at 12 months, the second between 4 and 6 years.
Where can I get vaccinated in Siem Reap?
Several public health centers and private clinics in Siem Reap offer the MMR vaccine. Check with your usual clinic or the provincial health office.
Should expat adults get vaccinated?
Adults born after 1957 who haven't had measles or don't have proof of vaccination should check their status and consider a booster dose.
What should I do if I have suspicious symptoms?
Seek medical advice promptly, isolate yourself to avoid spreading the disease, and avoid public places before diagnosis. Measles is highly contagious.
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The community guide for expats and travelers in Siem Reap, Cambodia