Add Yahoo as a preferred source to see more of our stories on Google. As states grappled with confusion around vaccines, COVID-19 cases have continued to fluctuate nationwide. Some regions of the ...

Rare but dangerous blood clotting associated with that vaccine as well as AstraZeneca’s had a genetic cause, according to a new paper.

With a new wave of COVID-19 cases spiking across the state, officials emphasize the importance of vaccines to prevent widespread disruptions. Since mid-May, The Los Angeles County Department of Public ...

Learn about the safety and effectiveness of COVID-19 vaccines for kids, the possible side effects, and the benefits of vaccination.

When people get the shots, the body’s immune system can accidentally confuse a normal protein from adenovirus - which is used to ferry coronavirus DNA into our cells, leading to the creation of ...

Sustained protection through 6 months, but effectiveness slipped as newer strains emerged ...

With fall, and by extension, respiratory illness season, underway, COVID-19 cases have continued to fluctuate nationwide. Some regions of the United States are experiencing "very high" and "high" ...

Researchers identify genetic mutation in small group of people who developed the serious disorder after receiving the AstraZeneca or Johnson & Johnson vaccine.

After years of sleuthing, Australian researchers believe they have cracked the cause of lethal blood clots caused in rare cases by AstraZeneca’s COVID vaccine – and how to beat the problem.

Arbutus alleges that Moderna’s COVID-19 vaccine infringes on patents protecting its lipid nanoparticle delivery technology.

As states grappled with confusion around vaccines, COVID-19 cases have continued to fluctuate nationwide. Some regions of the United States are experiencing "very high" COVID viral activity, according ...