SAN FRANCISCO (KGO) -- The omicron surge has caused the CDC to finally update its mask guidance late last week, indicating a clear preference for the level of protection offered by N95 and KN95 masks.

Add Yahoo as a preferred source to see more of our stories on Google. Who knew in 2020 that two years later, we’d still be wearing masks? Well, the reality is that we are, but luckily, our knowledge ...

Although being fully vaccinated against COVID-19 dramatically reduces your chances of becoming hospitalized and dying from the disease, the shots don’t entirely eliminate risks of infection. That’s ...