Measles is making a comeback: Can we stop it?
September 3, 2025
By Robert H. Shmerling, MD, Senior Faculty Editor, Harvard Health Publishing; Editorial Advisory Board Member, Harvard Health Publishing
... In the US, widespread vaccination halted the ongoing spread of measles more than 20 years ago, a major public health achievement. Before an effective vaccine was developed in the 1960s, nearly every child in the US got measles. Complications like measles-related pneumonia or hearing loss were common, and 400 to 500 people died each year ...
... Its estimated that when 95% of people in a community are vaccinated, both those individuals and others in their community are protected against measles ...
... Only 4% of the recent cases in the US involved people known to be fully vaccinated ...
A host of complications can develop, including
brain inflammation (encephalitis), which can lead to seizures, hearing loss, or intellectual disability
pmeumonia
eye inflammation (and occasionally, vision loss)
poor pregnancy outcomes, such as miscarriage
subacute sclerosing panencephalitis (SSPE), a rare and lethal disease of the brain that can develop years after the initial measles infection ...
https://www.health.harvard.edu/blog/measles-is-making-a-comeback-can-we-stop-it-202503063091