U.S. measles cases rise to 41, as CDC tallies infections now in 16 states

At least 41 cases of measles have been reported in the U.S. across 16 states so far this year, according to new weekly figures published Friday by the Centers for Disease Control and Prevention.

This is up from 35 cases in 15 states reported to the CDC, as of Feb. 22. Michigan is the new state now included in CDC's tally.

The figures mark one of the steepest increases in recent history of the virus at this time of the year. It comes as experts worry the country could face a repeat of 2019's massive surge, which authorities at the time said could threaten the U.S. status of having eliminated the virus.