#vaccination

Newly cited data suggest herd immunity for measles is already absent in roughly one-third of kindergarten classrooms in Allegheny County, underscoring how local declines in vaccination can narrow the margin of safety.

Bangladesh is carrying out emergency measles-rubella vaccinations as authorities try to contain an outbreak that has killed more than 100 children in less than a month.

A new report warns that even a 1% annual decline in MMR vaccination rates could trigger 17,000 measles cases, 4,000 hospitalizations, and 36 preventable deaths each year in the U.S.

Maryland has reported 26 mumps cases in the first two months of 2026, compared to just four cases for all of 2025. Most infections are concentrated in the Baltimore metropolitan area, and the majority of affected individuals had been vaccinated.