COVID-19 activity rises during the summer in California, and officials are advising people to take steps to protect ...

COVID-19 tests used to be able to detect a positive case within the first 48 hours, but many results are now delayed until four days after symptoms appear, according to the LA Times. Elizabeth Hudson, ...

A new study analyzing the immune response to COVID-19 in a Catalan cohort of health workers sheds light on an important question: does it matter whether a person was first infected or first vaccinated ...

The fastest vaccine ever created was the Zika vaccine, which took 7 months to be ready for clinical trials, but was halted from further testing when the virus began to slow. Dr. Anthony Fauci, ...

SAN FRANCISCO -- It's a story that has been making headlines across the United States: Did Californians develop herd immunity after possibly being exposed to novel coronavirus last year? On Thursday, ...