Whooping cough levels are at their highest since pre-pandemic in California, mirroring similar patterns elsewhere, say scientists.

The illness, also known as pertussis, has seen a drastic increase compared to 2023. A map below shows cases by ... the role ...

Santa Clara County had a previous whooping cough outbreak in 2019 with 172 cases. San Diego County has the most cases reported in the state, with 470 through Sept. 30. The last time Contra ...