It was not immediately clear where in Illinois the fourth case was reported, or what condition the patient is in.

The measles outbreak continues to spread throughout the U.S., sparking discussions about how best to protect children and ...

Childhood vaccination rates against measles fell in the years after the COVID-19 pandemic in nearly 80% of the more than ...

At least 62 people with measles have traveled on planes this year, and one person became infected. But being fully vaccinated ...

There was an uptick in measles cases across the U.S. over the last week, the Centers for Disease Control and Prevention reported Friday, though the spread of the highly contagious illness appears ...

Confirmed U.S. measles cases broke 1,000 in the second week of May, surpassing last year's total by nearly four times.

On Tuesday, the New Madrid County Health Department announced a confirmed case of measles in an adult county resident.

According to the US Centers for Disease Control and Prevention, two doses of the MMR (measles, mumps and rubella) vaccine are 97% effective at preventing measles, while one dose is 93% effective. It ...