flu

President Donald Trump speaks about the coronavirus in the Rose Garden of the White House, Friday, May 15, 2020, in Washington. (AP Photo/Alex Brandon)

FILE - In this 1918 file photo made available by the Library of Congress, volunteer nurses from the American Red Cross tend to influenza patients in the Oakland Municipal Auditorium, used as a temporary hospital. Science has ticked off some major accomplishments over the last century. The world learned about viruses, cured various diseases, made effective vaccines, developed instant communications and created elaborate public-health networks. Yet in many ways, 2020 is looking like 1918, the year the great influenza pandemic raged. (Edward A. "Doc" Rogers/Library of Congress via AP, File)

FILE - In this April 10, 2020, file photo, wearing protective masks ground crew at the Los Angeles International airport unload supplies of medical personal protective equipment from a China Southern Cargo plane. Before the coronavirus outbreak, many states had only a modest supply of medical equipment. An Associated Press review of more than 20 states found that many were still storing items that were left over from an influenza pandemic a decade ago and long since expired. (AP Photo/Richard Vogel, File)

A man walks a dog as oil tankers sit offshore Wednesday, April 22, 2020, in Huntington Beach, Calif. About three dozen tankers are parked between Long Beach and the San Francisco Bay Area with nowhere to go due to lack of demand and nowhere to store the oil. (AP Photo/Mark J. Terrill)

FDNY ambulances are seen entering and leaving the emergency room at Queens Hospital Center, Monday, April 20, 2020, in the Jamaica neighborhood of the Queens borough of New York. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Mary Altaffer)

In this April 2, 2020, photo, Choi Jung Hun, a former North Korean doctor who came to South Korea in 2012, speaks during an interview with The Associated Press in Seoul, South Korea. North Korea says it has zero coronavirus infections, but experts doubt it and say it’s likely the virus has already spread in the country. Choi and other defectors told that workers didn’t have test kits when they dealt with past outbreaks and weren’t even asked to confirm or submit cases to the central government. (AP Photo/Lee Jin-man)

FILE - In this March 16, 2020, file photo, Tomas Aragon, health officer for the city and county of San Francisco, speaks during a press conference headed by public health directors spanning six Bay Area counties in San Jose, Calif. On the morning of March 15, as Italy became the epicenter of the global coronavirus pandemic, a half dozen high-ranking California health officials held an emergency conference call to discuss a united effort to contain the spread of the virus in the San Francisco Bay Area. That call and the bold decisions that came in the hours afterward have helped California avoid the kind of devastation from the virus in parts of Europe and New York City. (Dai Sugano/Bay Area News Group, File)

FILE - In this March 19, 2020, file photo laboratory scientist Andrea Luquette cultures coronavirus to prepare for testing at U.S. Army Medical Research and Development Command at Fort Detrick in Frederick, Md., where scientists are working to help develop solutions to prevent, detect and treat the coronavirus. (AP Photo/Andrew Harnik, File)