COVID-19 vaccine

Protein subunit vaccines work by injecting people with a tiny portion of a virus. In the case of the COVID-19 vaccine, that tiny portion is the spike protein that the coronavirus uses to enter cells.

The companies say a study of more than 10,000 volunteers showed a vaccine efficacy of 95% or greater for people receiving the booster.

Singapore's government will stop covering the cost of COVID-19 treatment for those who are "unvaccinated by choice" next month, citing the strain they are placing on its health care system.

The first vaccine required for school was for smallpox, over 200 years ago. And for decades, all states have required that kids be vaccinated against contagious diseases like polio to attend school.

There are a couple of big steps to get through before U.S. kids under 12 might be able to get the vaccine. Here's how the process works and when the shots could arrive.

Moderna says a study in kids 6 to 11 found two doses of the company's COVID-19 vaccine given 28 days apart produced a strong antibody response.

The policy announced Monday threatens a "hard quarantine" that is longer than the Games themselves for anyone who arrives unvaccinated.

The companies studied a 10 microgram vaccine dose in children 5 to 11, a third of the dose used for adults, to minimize side effects and because it still prompts a strong immune response.

San Francisco's only In-N-Out location still hasn't reopened for indoor dining. The restaurant violated public health requirements by allowing customers to enter without showing proof of vaccination.

A panel of experts voted to recommend that the Food and Drug Administration authorize a booster dose of the Johnson & Johnson COVID vaccine at least two months after the first shot.

Should people who get a COVID booster get a different vaccine from their original shot? The results of a highly anticipated study suggest that in some cases the answer may be yes.

Air New Zealand will turn one of its 787s into a COVID-19 vaccination clinic at the Auckland Airport on Saturday. It's part of a broader day of action aimed at boosting the country's vaccination rate.