Americas measles top 18,000 cases

The Pan American Health Organization said on May 8 that countries in the Americas had reported 18,352 confirmed measles cases and 15 deaths between epidemiological weeks 1 and 16 of 2026. The regional total has already exceeded the 14,503 cases and 32 deaths reported in all of 2025, according to PAHO. In Virginia, the state health department declared a measles outbreak in Buckingham County on May 13 after identifying 12 related cases. The cluster has added a local U.S. example to a broader regional resurgence that health authorities have tied to immunity gaps and missed vaccination. ### How large is the outbreak across the Americas? PAHO said 18,352 confirmed cases had been reported across the region by May 8, covering the first 16 epidemiological weeks of 2026. The agency said the outbreak count included 15 deaths and described the overall public health risk for the Americas as “very high” in a separate 2026 outbreak update. The 2025 total reached 14,503 cases, PAHO said, meaning the region passed last year’s full-year count before mid-May. PAHO warned in a February 3 epidemiological alert that the increase in 2025 and early 2026 required “immediate and coordinated action” by member states. ### What did Virginia say about Buckingham County? (paho.org) The Virginia Department of Health said on May 13 that Buckingham County had 12 outbreak-associated measles cases. The agency defines an outbreak as three or more related cases among non-household members. Virginia health officials said no patients in the Buckingham County outbreak reported recent travel. (paho.org) A May 8 state release had identified an initial confirmed case in a school-age child and said the patient had been exposed locally, not during travel. ### Why are officials focused on vaccination gaps? (vdh.virginia.gov) PAHO said the resurgence in 2025 and 2026 has undermined years of measles elimination efforts in the Americas. The agency linked the spread to persistent immunity gaps across the region. The U.S. Centers for Disease Control and Prevention says two doses of the measles, mumps and rubella vaccine are the best protection against measles. (vdh.virginia.gov) CDC says the vaccine usually protects people for life against measles and rubella. ### What should travelers and families do before trips or gatherings? CDC says people who are not fully vaccinated, or do not know their vaccination status, should plan to be vaccinated before international travel. (paho.org) The agency says travelers should receive two doses of MMR at least two weeks before departure for the best protection. CDC also says anyone who is not fully vaccinated and travels internationally or to a place with a measles outbreak is at risk. (cdc.gov) The agency advises people not to travel if they are sick and to call a doctor immediately if they think they or their child has been exposed. ### How fast can measles spread after an exposure? Virginia health officials said symptoms can begin 7 to 21 days after exposure, with an average of about 10 days. (cdc.gov) The rash usually appears within 14 days, according to the state’s clinician guidance. VDH said patients are considered infectious from four days before through four days after rash appearance. (cdc.gov) The agency has told healthcare providers in or near Buckingham County to discuss outbreak vaccination recommendations with patients who live in or visit the area. ### What comes next in Virginia and across the region? Virginia’s measles response page said on May 13 that additional cases were likely to occur in Buckingham County. (vdh.virginia.gov) The state has published a dedicated case-data and exposure-information page for the 2026 response. PAHO’s next regional updates are being posted through its measles situation reports and bulletins for 2026. (vdh.virginia.gov) CDC is continuing to direct travelers and clinicians to its measles vaccination, travel and outbreak-response guidance. (paho.org) (vdh.virginia.gov)