A National Guardsman directs traffic at a COVID-19 testing site outside Hard Rock Stadium, Wednesday, July 8, 2020, in Miami Gardens, Fla. Florida is one of the nation's hot spots for coronavirus. (AP Photo/Wilfredo Lee)

Jorge Garcia of New Orleans gets tested for COVID-19 at a mobile testing site in New Orleans, Wednesday, July 8, 2020. Testing sites in New Orleans have been running out of their daily allocation of tests within minutes of opening. (AP Photo/Gerald Herbert)

Registered nurse Keith M. takes a sample from Jerri at a drive-through COVID-19 test site at Austin Emergency Center in Austin, Texas, on Wednesday July 8, 2020.(Jay Janne)/Austin American-Statesman via AP)

People line up for COVID-19 testing at a mobile testing site in New Orleans, Wednesday, July 8, 2020. Testing sites in New Orleans have been running out of their daily allocation of tests within minutes of opening. (AP Photo/Gerald Herbert)

A man attempts to self administer a COVID-19 test during a U.S. Department of Health and Human Services (HHS) mass testing site at HEB Park, Wednesday, July, 8, 2020 in Edinburg, Texas. Hidalgo County is one of only three sites picked by the federal government for the mass testing. (Delcia Lopez/The Monitor via AP)

Nurse Esma Radoncic, left, prepares to take a nasal swab from Eric Antosh at a COVID-19 testing site in Brooklyn run by NYC Health + Hospitals as part of the "Get Tested Day of Action," Wednesday, July 8, 2020, in New York. Free testing is being offered at sites throughout the city. (AP Photo/Mark Lennihan)

Lines of cars wait at a drive-through coronavirus testing site, Sunday, July 5, 2020, outside Hard Rock Stadium in Miami Gardens, Fla. Florida health officials say the state has reached a grim milestone: more than 200,000 people have tested positive for the novel coronavirus since the start of the outbreak. (AP Photo/Wilfredo Lee)

A medical worker gets her temperature checked before entering Dell Seton Medical Center at the University of Texas on Wednesday July 8, 2020, in Austin, Texas. (Jay Janner/Austin American-Statesman via AP)

Health officials and members of the military assist during COVID-19 testing, Wednesday, July 8, 2020, at HEB Park in Edinburg, Texas. (Delcia Lopez/The Monitor via AP)

Edif Madrid, right, and Rosa Guillen wait in a line for COVID-19 testing at a mobile testing site in New Orleans, Wednesday, July 8, 2020. Testing sites in New Orleans have been running out of their daily allocation of tests within minutes of opening. (AP Photo/Gerald Herbert)

People line up for COVID-19 testing at a mobile testing site in New Orleans, Wednesday, July 8, 2020. Testing sites in New Orleans have been running out of their daily allocation of tests within minutes of opening. (AP Photo/Gerald Herbert)

A nurse in protective gear administers a coronavirus test in Omaha, Neb., Wednesday, July 8, 2020. Vice President Mike Pence says the U.S. government will issue guidance encouraging front-line health care workers to reuse personal protective equipment. Pence added that PPE supplies remain "very strong" but the Trump administration will be encouraging healthcare workers "to use some of the best practices" to "preserve and reuse" face masks and other protective equipment. (AP Photo/Nati Harnik)

Shania Dod, right, collects a sample at a United Memorial Medical Center COVID-19 testing site, Wednesday, July 8, 2020, in Houston. (AP Photo/David J. Phillip)

Health officials and members of the military assist during COVID-19 testing, Wednesday, July 8, 2020, at HEB Park in Edinburg, Texas. (Delcia Lopez/The Monitor via AP)

People wait inside their vehicles in line at COVID-19 testing site Wednesday, July 8, 2020, in Houston. Texas has surpassed 10,000 new coronavirus cases in a single day for the first time as a resurgence of the outbreak rages across the U.S. The record high of 10,028 confirmed cases Tuesday follows Republican Gov. Greg Abbott decision to mandate masks in much of the state and to close bars, retreating from what had been one of America’s fastest reopenings. (AP Photo/David J. Phillip)