Dr. Anthony Fauci

Dr. Anthony Fauci said that recommending vaccinated people wear masks is “under active consideration” by the government’s leading public health officials.

Pfizer's plan to seek booster authorization drew a rebuttal last week from the CDC, which said booster shots were not needed “at this time.” However, Dr. Anthony Fauci didn’t rule out the possibility.

All the data so far shows the vaccines are highly effective at preventing serious disease or hospitalization, Dr. Anthony Fauci said. Vaccination is also imperative to preventing mutations, he added.

First lady Jill Biden and Dr. Anthony Fauci were in Florida on Thursday urging residents to get a coronavirus vaccine.

More contagious than other variants, and maybe more likely to cause severe disease, Delta is spreading so fast in the U.S. it could cause another surge this summer or fall, according to new research.

NPR's Leila Fadel talks to Dr. Anthony Fauci about the CDC declaring the Delta variant of COVID-19 a concern, and how vaccines and booster shots fit into the discussion of combating variants.

Thousands of pages of Dr. Fauci's emails have been released to reporters. Here's what they tell us about his life and manner during the early months of the pandemic.

Leading virologists, including Dr. Anthony Fauci, are demanding a deeper probe into China’s Wuhan Institute of Virology as they try to identify the source of the deadly coronavirus.

"If I had grandchildren, I would certainly recommend they get vaccinated," President Biden's chief medical adviser said. COVID-19 vaccines for younger children are being tested in clinical trials now.

Fauci told NBC’s “Today” show that as cases decrease, “you are definitely going to see the CDC come back and be more flexible.”