National Geographic Archives - Linda Marsa

Is a ‘twindemic’ of flu and COVID-19 about to hit the U.S.?

By amymasson | October 13, 2021

A woman gets a shot at a physician's office where people can receive both the COVID-19 and flu vaccines. Photograph by Vyacheslav Prokofye, TASS via GettY Images

Why we need booster shots against variants to help end the pandemic

By amymasson | April 7, 2021

A health worker screens visitors for COVID-19 symptoms at the Tembisa Hospital in Tembisa, South Africa. Photograph by Guillem Sartorio, AFP via Getty Images.