As friends and family gather this holiday season, there’s a warning for new parents. The CDC says cases of pertussis, or whooping cough, remain elevated this year. An unvaccinated infant died from the ...

For the second year in a row, the US has surpassed 25,000 whooping cough cases — another sign of the risks of falling vaccination levels. Often called the “100-day cough,” whooping cough or pertussis ...