WASHINGTON -- Many of the world's richest countries have spent the past year hoarding coronavirus vaccines, buying up enough doses to vaccinate their populations several times over and consistently ...

PHILADELPHIA -- Americans face at least two weeks of uncertainty before major questions may get answered about the omicron variant of the coronavirus. Health experts urge the public to be cautious and ...

Scientists say the vaccines that use genetic technology can be easily tweaked. Vaccine makers say they are in the midst of testing their shots' effectiveness against the newly discovered omicron ...

SAN FRANCISCO (KGO) -- Now that the omicron variant has reached the U.S. via the Bay Area, the question follows, what happens next for vaccines, public policy and research? UCSF has confirmed they're ...

NEW YORK (WABC) -- Pfizer and BioNTech say if a variant that evades the vaccine emerges, they would be ready to produce a tailor-made shot against that new variant within about 100 days. The companies ...

While the omicron variant appears to be more resistant to COVID-19 vaccines, Dr. Anthony Fauci stressed Wednesday that the vaccines still offer substantial protection against the newly-discovered ...

Appearing on Meet the Press Sunday, the infectious disease expert said that early indications are that the Omicron variant could “evade” protection from both natural immunity and vaccines. “The ...

WASHINGTON -- As the "extraordinarily contagious" omicron variant surges across the United States, Dr. Anthony Fauci warned that COVID-19 cases will likely continue to climb. "Every day it goes up and ...