Open Outbreak

Should I be worried about Measles resurgence?

Updated · Graded from official assessments; nothing here is medical advice.

Measles resurgence · Attention: high

If you are in the affected area high
PAHO said on 2026-10-09 that the risk of measles spread across the Americas remains very high because of ongoing outbreaks, vaccination gaps and increased travel tied to upcoming religious mass gatherings. According to PAHO
If you are elsewhere in the same country or region high
PAHO said on 2026-10-09 that the risk of measles spread across the Americas remains very high. That is the clearest current official assessment for people elsewhere in the same affected country or region. According to PAHO
If you are travelling there soon high
PAHO said on 2026-10-09 that the risk of measles spread across the Americas remains very high ahead of large religious mass gatherings, with increased travel one of the reasons it cited. According to PAHO
If you are elsewhere in the world moderate
WHO assessed the wider risk as moderate in its Bangladesh outbreak notice on 2026-04-23. In its Region of the Americas notice on 2025-04-28, WHO also said the risk of international spread could not be ruled out and rated the wider risk as moderate. According to WHO

What is happening

Measles is resurging in several parts of the world, with the clearest current official warning coming from the Americas. On 2026-10-09, PAHO said the risk of spread across the Americas remains very high ahead of large religious mass gatherings, and reported 55,792 confirmed cases and 77 deaths in 17 countries and territories between 2026-01-04 and 2026-10-03. WHO notices also describe recent outbreaks in Bangladesh and Morocco, while ECDC kept measles on its active public health threats list in week 41. In recent media coverage, U.S. reports described up to 4,410 confirmed cases nationally and Pennsylvania state reports of 1,222 confirmed cases and 6 deaths, while Bangladesh reports cited 202,000 suspected cases, 22,000 confirmed cases and 1,147 deaths, unverified. Officials are focusing on catch-up vaccination, surveillance, contact tracing, laboratory support and rapid response, and PAHO has urged stronger vaccination and preparedness before mass gatherings.

Who is affected and how it spreads

Measles is a highly contagious viral disease that spreads mainly through the air and respiratory droplets from an infected person. WHO says about 90% of non-immune people exposed to an infectious person are estimated to become infected, and symptoms usually begin about 10 to 14 days after infection. Severe illness is more likely in children under 5 years, malnourished children, people with vitamin A deficiency and people with weakened immune systems. WHO says a measles-containing vaccine is safe and effective, and that two doses can prevent the disease.

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Updates

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