US records 4,410 measles cases as outbreak grows

The CDC has recorded 4,410 measles cases in the United States in 2026, up by 330 in a week, along with 451 hospitalisations. People aged 5–19 account for 42 percent of cases, adults aged 20 and older for 41 percent, and children under five for 17 percent. In Pennsylvania, the outbreak has infected 1,222 people across 42 counties and caused 225 hospitalisations and five confirmed deaths; officials are investigating a sixth reported death. At the state’s request, the CDC is sending an investigator, while health teams have administered more than 5,900 MMR vaccine doses at pop-up clinics.