Members of the White House press corps including Kristen Welker of NBC, Francesca Chambers of McClatchy and John Roberts of Fox News all wear protective face masks as U.S. President Donald Trump holds a coronavirus disease (COVID-19) outbreak response press briefing in the Rose Garden of the White House in Washington, U.S., May 11, 2020. (Photo/Agencies)
U.S. Health and Human Services (HHS) Secretary Alex Azar wears a protective face mask among other officials and media wearing masks as U.S. President Donald Trump holds a coronavirus disease (COVID-19) outbreak response briefing in the Rose Garden at the White House in Washington, U.S., May 11, 2020. (Photo/Agencies)
Assistant Health and Human Services (HHS) Secretary for Health Admiral Brett Giroir, coordinator for COVID-19 diagnostic testing, wears a protective face mask as he stands and talks with other officials wearing masks including HHS Secretary Alex Azar (R) before U.S. President Donald Trump holds a coronavirus disease (COVID-19) outbreak response briefing in the Rose Garden at the White House in Washington, U.S., May 11, 2020. (Photo/Agencies)
White House Press Secretary Kayleigh McEnany (far L) and other White House staff all wearing protective face masks including U.S. military members of the White House Communications Agency running the sound system listen as U.S. President Donald Trump holds a coronavirus disease (COVID-19) outbreak response press briefing in the Rose Garden of the White House in Washington, U.S., May 11, 2020. (Photo/Agencies)
