South Africa is the worst-hit country in Africa, but has not yet started doing Covid-19 vaccinations.
The coronavirus is mutating faster than scientists thought, and some strains might be more infectious or able to evade vaccines. So the race is on to...
Moderna Inc said on Tuesday it had received a report from California's health department that several people at a center in San Diego were treated for...
Tiny aerosols of the virus emitted when speaking linger in air for longer than larger droplets from a cough
A cluster of allergic reactions at a single facility in San Diego has prompted officials to halt the distribution of a batch of the Moderna vaccine.
Concerns about vaccine supply and the new variant continue, even as the surge abates. Overall, more than 7% of Californians have gotten a coronavirus infection....
Three days before registration begins for the next phase of COVID-19 vaccinations, the governor and health officials are urging those who want to sign up to...
Health leaders have admitted Oregon got off to a slow and bumpy start in its efforts to roll out COVID-19 vaccines compared to Washington state. Complicating...
Health officials are trying to stay ahead of the virus by vaccinating as many people as possible — but it hasn't been easy.
Maine says it received vaccines with "the thermometer on the outside of the boxes ... [showing] that at some point the required minimum temperature had been...