Health officials around the country are sounding the alarm: Syphilis cases are spiking. And in several California counties, ...

California in 2026 has already seen its highest number of annual measles cases in seven years. The looming new domestic beachhead comes as vaccination rates have fallen.

A potentially more dangerous strain of the mpox virus was detected for the first time in a San Francisco resident. It is the ...

Rotavirus, a highly contagious intestinal virus, has been detected in high concentrations in five California areas.