Health experts are on the verge of possibly having two COVID-19 vaccines and ABC13 has learned how the two compare. SEE RELATED STORY: US COVID-19 vaccinations ramp up as Moderna shot nears ...

Despite a U.S. factory mixup, more Johnson & Johnson doses are becoming available in the U.S., marking the only single-shot vaccine option. So how effective is it and how does it compare to the Pfizer ...

WASHINGTON — U.S. regulators approved updated COVID-19 shots Wednesday but limited their use for many Americans — and removed one of the two vaccines available for young children. Additionally, Pfizer ...

Amid confusion over this year's updated COVID-19 vaccines, we explain what's different this year and who experts say should ...

WASHINGTON — The U.S. will likely begin distributing a third vaccine against COVID-19 in the next week, and health officials are girding for questions about which one is best. The Johnson & Johnson ...

Moderna Inc's experimental COVID-19 vaccine is more stable than expected at temperatures that ordinary refrigerators can provide and can be distributed using existing cold-chain shipping and storage ...

Moderna is suing Pfizer and BioNTech for infringing patents central to Moderna's mRNA technology platform used to develop the COVID vaccine, the company said in a press release Friday. A widely ...

The FDA approved the updated COVID-19 vaccinations for all seniors, but limited access for younger adults and children. Pfizer's vaccine won't be available for children under 5 after the FDA pulled ...