Discussions around whether a COVID-19 vaccine booster is necessary can have seemingly conflicting information. “It’s complicated. This is not just a simple equation,” Dr. Michelle Barron, senior ...

The Centers for Disease Control and Prevention is issuing new advice for people who are immunocompromised. The health organization said people who've had the MRNA vaccines should look to get a fourth ...

SAN FRANCISCO -- Moderna announced people may need a second booster to increase protection. But is a fourth shot the right approach? ABC7 News reporter Luz Pena from San Francisco spoke to multiple ...

Health experts are reinforcing the point that full vaccination remains highly effective against severe illness and death caused by COVID-19 as federal regulators consider the possibility of ...

WASHINGTON -- With winter closing in and coronavirus case rates creeping up once again, White House chief medical adviser Dr. Anthony Fauci is warning that the vaccines' waning immunity combined with ...