Does masking up against measles work?

Those who have been exposed to measles should mask up to help limit transmission to other people, especially vulnerable groups like children and pregnant women. — Filepic

According to the science journal Nature, the measles outbreak in the United States is still growing with no end in sight.

It reported that, as of March 18 (2025), 279 cases had been reported in the state of Texas, 38 in New Mexico and as many as four in Oklahoma, which both border Texas.