Dr Anthony Fauci urged Americans to take a vaccine if they had not already done so and to take a booster if eligible. Photograph: Jim Lo Scalzo/EPA

The first case of the new Omicron variant of Covid-19 in the United States has been recorded in California. The person concerned had returned from S(...)

Dr Anthony Fauci, centre, with John Mascola, director of the Vaccine Research Center at the National Institute of Allergy and Infectious Diseases, and US president Donald Trump, last year. Photograph: Doug Mills/The New York Times

The US government’s chief medical adviser, Dr Anthony Fauci, warned on Sunday that time was running short to prevent a “dangerous” new surge of Covid-(...)

The findings of two new studies signal the need for better masks in some situations, and indicate that the virus is changing in ways that make it more formidable. Photograph: iStock

Newer variants of coronavirus such as Alpha and Delta are highly contagious, infecting far more people than the original virus. Two new studies offer (...)

Dr Anthony Fauci said health officials are  considering whether to revise mask guidance for vaccinated Americans. File photograph: Jim Lo Scalzo/Pool Photo via AP, File

Top infectious disease official Anthony Fauci said on Sunday that Americans who are immune compromised may end up needing Covid-19 vaccine booster sh(...)

Anthony Fauci speaks following a Senate Appropriations Subcommittee hearing in Washington, DC, on May 26th. Photograph: EPA

Joe Biden’s chief medical adviser has called on China to release the medical records of nine people whose illnesses might provide vital clues into whe(...)

US president Joe Biden: “Do your part. Give it your all. Let’s celebrate a truly historic Independence Day.” Photograph: Mandel Ngan/AFP

US president Joe Biden designated June as a “month of action” as he doubled down on efforts to increase Covid-19 vaccination rates across the United S(...)

Members of the World Health Organisation  team investigating the origins of the  coronavirus pandemic arrive  at the Wuhan Institute of Virology  on February 3rd last. Photograph: Hector Retamal/AFP via Getty Images

When US president Joe Biden last week ordered US intelligence to intensify efforts to determine the origins of Covid-19, he gave fresh life to the the(...)

US infectious diseases expert, Dr Anthony Fauci, holds up the scroll he received from the Royal College of Physicians of Ireland (RCPI) as he was conferred with his Honorary Fellowship

Countries “can’t just completely turn off all public health measures” as more and more people are vaccinated against Covid-19, top US infectious disea(...)

Dr Anthony Fauci  and former president Donald Trump during the daily White House coronavirus briefing  in April last year. Photograph: Doug Mills/The New York Times

For almost 40 years, Dr Anthony Fauci has held two jobs. As director of the US National Institute of Allergy and Infectious Diseases, he has run one o(...)

A sign warns motorists of turkeys crossing Highway 86 near The Good Samaritan Society care center. The first person in the United States known to be infected with a new Covid-19 variant was a Colorado National Guardsman who had been sent to help out at the nursing home struggling with an outbreak. Photograph: David Zalubowski/AP Photo

The first reported US case of the Covid-19 variant that has been seen in the United Kingdom has been discovered in Colorado, Governor Jared Polis anno(...)

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