Motorcyclists join an awareness campaign organized by the World Health Organization (WHO) to combat Ebola in Bunia, Congo, Wednesday, June 10, 2026. (AP Photo/Moses Sawasawa)

Motorcyclists join an awareness campaign organized by the World Health Organization (WHO) to combat Ebola in Bunia, Congo, Wednesday, June 10, 2026. (AP Photo/Moses Sawasawa)

FILE - Lauren Ellenburg, a nurse, prepares a combination measles, mumps and rubella vaccine for a patient at Tiger Pediatrics in Easley, S.C., March 17, 2026. (AP Photo/Mary Conlon, File)

A screen displays infectious disease risk assessments for the World Cup at Georgetown's Health Security Operations Center in Washington on June 3, 2026. (AP Photo/Shelby Lum)

Georgetown University's Rebecca Katz points to waste water data looking at infectious diseases at Georgetown's Health Security Operations Center in Washington on June 3, 2026. (AP Photo/Shelby Lum)

Georgetown University's Rebecca Katz points to measles data for the country at Georgetown's Health Security Operations Center in Washington on June 3, 2026. (AP Photo/Shelby Lum)

Residents take shelter in a field at a municipal hall in Sarangani province, Philippines, Wednesday, June 10, 2026. (AP Photo/Basilio Sepe)

Residents take shelter in a field at a municipal hall in Sarangani province, Philippines, Wednesday, June 10, 2026. (AP Photo/Basilio Sepe)