Defense Secretary Lloyd Austin tested positive for COVID-19 for the second time, he announced in a statement Monday.

Austin said his doctor told him the symptoms would be worse if he were not vaccinated and boosted.

“Vaccinations continue to both slow the spread of COVID-19 and to make its health effects less severe,” Austin said. “Vaccination remains a medical requirement for our workforce, and I continue to encourage everyone to get fully vaccinated and boosted.”

Austin plans to work virtually as he did when he tested positive in January.

DOD file photo by U.S. Air Force Staff Sgt. Jack Sanders