No additional cases were identified, and the San Francisco Department of Public Health is investigating the case. Bird flu is a disease caused by avian influenza A viruses, according to the CDC.

Signs of H5N1 bird flu virus have been detected at three wastewater sites in the San Francisco Bay Area, according to sampling data. Although positive wastewater samples have been found in seven ...

Genetic evidence of bird flu was detected in San Francisco wastewater on June 18 and June 26. Additional H5 "hits" were seen at a site in Palo Alto on June 19, and another on June 10 from the West ...

As federal and state health officials expand their avian flu surveillance, the San Francisco Department of Public Health has reported that the virus has been detected in wastewater samples ...

Health officials said Monday that the H5N1 avian flu was detected last month in two asymptomatic chickens at a live bird market in San Francisco, but there is no sign that the public has been exposed.

The loss of local hens led to a spike in egg prices in the San Francisco Bay Area over the ... that could become infected and spread avian flu to commercial farms. "We have wild birds that are ...

Avian flu cases have spiked around the globe in recent weeks ... “People are worried that it’s circulating a ton in birds and, now, some in mammals,” explains UC San Francisco infectious disease ...

“To date, there’s been 55 detections of [highly pathogenic avian influenza] in wild birds in Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano and Sonoma ...