U.S. records most whooping cough deaths since 2017

The U.S. confirmed at least a dozen deaths from whooping cough last year, according to preliminary figures released this week by the Centers for Disease Control and Prevention. That marks the most fatalities from the bacterial infection since a 2017 surge of the illness, which is also known as pertussis.

Over the last month, pertussis infections have been rising again. While cases reported to the CDC by health departments dipped over the winter holidays, weekly infections have accelerated for a month straight since then.

At least 360 pertussis cases were reported nationwide in last week's update to the CDC's tally of infections. Cases are up 27% from the week before.