Paramedics Carolina Estrada, left, disinfects her partner Elvin Munguia after mobilizing a COVID-19 patient from his home to a hospital in the Iztapalapa district of Mexico City, Tuesday, Feb. 2, 2021. (AP Photo/Marco Ugarte)

Signs direct people to a recently opened COVID-19 vaccination center at California State University, Sacramento in Sacramento, Calif., Tuesday, Feb. 2., 2021. California has administered more than 3.5 million doses, significantly boosting the daily number of shots it has give just weeks ago, Dr. Mark Ghaly, California's health and human services secretary, said Tuesday, but it still lags most other states in delivering doses and residents report on going frustrations trying to get an appointment. The center, run by Sacramento County is accepting appointments for those 65 and over, law enforcement and emergency services personnel. (AP Photo/Rich Pedroncelli)

FILE - In this Aug. 14, 2017, file photo, San Francisco City Attorney Dennis Herrera listens to questions during a press conference at City Hall in San Francisco. The city of San Francisco took a dramatic step Wednesday, Feb. 3, 2021, in its effort to get children back into public school classrooms, suing its own school district to try to force open the doors amid the coronavirus pandemic. City Attorney Herrera, with the backing of Mayor London Breed, announced he had sued the San Francisco Board of Education and the San Francisco Unified School District in a statement and discussed it at a news conference. (AP Photo/Marcio Jose Sanchez, File)

FILE - In this Jan. 8, 2021, file photo, California Gov. Gavin Newsom outlines his 2021-2022 state budget proposal during a news conference in Sacramento, Calif. About a year after the state's first coronavirus case, Newsom has gone from a governor widely hailed for his swift response to a leader facing criticism from all angles. (AP Photo/Rich Pedroncelli, Pool, File)

Local residents join a national clap beside a mural of Captain Sir Tom Moore in East Belfast, Northern Ireland, Wednesday, Feb. 3, 2021. Captain Moore passed away Tuesday after being treated with Covid-19 and was known for his achievements raising millions of pounds for the NHS charity during the Covid-19 pandemic. (AP Photo/Peter Morrison)

FILE - In this Dec. 22, 2020, file photo, Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, speaks before receiving his first dose of the COVID-19 vaccine at the National Institutes of Health, in Bethesda, Md. Fauci suggests fans enjoy the Super Bowl on Sunday, Feb. 7, 2021 with people in their household. (AP Photo/Patrick Semansky, Pool, File)

Christophe Dubi, Olympic Games Executive Director for the International Olympic Committee (IOC), left, and Craig Spence, Chief Brand and Communications Officer for the International Paralympic Committee (IPC), join other representatives from the Tokyo Organizing Committee of the Olympic and Paralympic Games (Tokyo 2020) at a Joint press briefing in Tokyo on Wednesday, Feb. 3, 2021. Tokyo 2020, IOC and IPC announced Wednesday they jointly developed and published the first version of "The Playbooks," which contains advice from international and Japanese health experts for COVID-19 countermeasures as well as the guidelines and rules that each games stakeholder will need to observe in order to play their part in ensuing a safe and secure games. (Du Xiaoyi/Pool Photo via AP)

FILE - In this May 4, 2020, file photo, Oklahoma House Speaker Charles McCall, left, R-Atoka, looks on as Senate President Pro Tempore Greg Treat, right, R-Oklahoma City, answers a question at a news conference in Oklahoma City. Oklahoma House and Senate leaders on Friday, Jan. 29, 2021, announced safety protocols for the upcoming legislative session that include encouraging, but not requiring, lawmakers wear masks when at the state Capitol. (AP Photo/Sue Ogrocki, File)

A person in a face mask walks past a storefront advertising their back to school sale, in Ottawa, Ontario, on the Labour Day long weekend, Monday, Sept. 7, 2020, in the midst of the COVID-19 pandemic. (Justin Tang/The Canadian Press via AP)

In this image from video, Jeff Zients, White House coronavirus response coordinator, speaks as Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases and chief medical adviser to the president., Dr. Marcella Nunez-Smith, chair of the COVID-19 health equity task force, Dr. Rochelle Walensky, director of the Centers for Disease Control and Prevention, and Andy Slavitt, senior adviser to the White House COVID-19 Response Team,, appear on screen during a White House briefing on the Biden administration's response to the COVID-19 pandemic Wednesday, Jan. 27, 2021, in Washington. (White House via AP)

A member of the medical team treats a patient with coronavirus in the ICU department of the Clinica Universitaria, in Pamplona, northern Spain, Tuesday, Feb. 2, 2021. Spain's virus expert for the coronavirus pandemic says infections in the country are losing steam but that the contagion curve needs to be bent much further to safeguard the health system. (AP Photo/Alvaro Barrientos)

A sign is posted "COVID-19 testing in NOT available at this location," on the doors of a CVS pharmacy in Los Angeles Wednesday, Feb. 3, 2021. California's rollout has been bumpy and chaotic, marked by differing county rules and too little vaccine. The Biden administration has pledged to ramp up delivery, and on Tuesday, Feb. 2, CVS pharmacies announced it would start inoculating people in some California stores next week.(AP Photo/Damian Dovarganes)

FILE - In this Feb. 5, 2016, file photo, is the Oakland–Alameda County Coliseum in Oakland, Calif. California is joining with the federal government to open two new vaccination centers as test areas for new President Joseph Biden's effort to create 100 mass vaccination sites nationwide in 100 days. Gov. Gavin Newsom said Wednesday, Feb. 3, 2021, that the sites at the Oakland-Alameda Coliseum and California State University, Los Angeles, will be jointly run with the Federal Emergency Management Agency. (AP Photo/Eric Risberg, File)

Japan's Foreign Minister Toshimitsu Motegi, left, and Defense Minister Nobuo Kishi attend a video conference with British Foreign Secretary Dominic Raab and Defense Minister Ben Wallace on screen, not seen, at the Foreign Ministry in Tokyo, Feb. 3 2021. Both parties held their 4th Japan-UK Foreign and Defense Ministerial Meeting '2+2' to strengthen their cooperation. (Franck Robichon/Pool via AP)

Cambodian school girls wear face masks as they drive their motorbikes back home at the end of their school outside Phnom Penh, Cambodia, Wednesday, Feb. 3, 2021. (AP Photo/Heng Sinith)

This photo shows the first version of "The Playbooks" revealed during a Joint press briefing in Tokyo on Wednesday, Feb. 3, 2021. Representatives from the Tokyo Organizing Committee of the Olympic and Paralympic Games (Tokyo 2020), the International Olympic Committee (IOC) and the International Paralympic Committee (IPC) announced Wednesday they jointly developed and published the first version of "The Playbooks," which contains advice from international and Japanese health experts for COVID-19 countermeasures as well as the guidelines and rules that each games stakeholder will need to observe in order to play their part in ensuing a safe and secure games. (Du Xiaoyi/Pool Photo via AP)

The Rev. Dr. Alfred Cockfield, Pastor God's Battalion of Prayer Church sits in the recovery area after receiving the first dose of the COVID-19 vaccine at a pop-up COVID-19 vaccination site at the church, Wednesday, Feb. 3, 2021, in the Brooklyn borough of New York. Rev. Cockfield and First Lady Linette received the vaccine in a public show of trust and faith in the vaccine. (AP Photo/Mary Altaffer)

A rose among floral tributes laid in memory of Captain Tom Moore on the village green in Marston Moretaine, England, Wednesday, Feb. 3, 2021. Captain Tom Moore, the 100-year-old World War II veteran who captivated the British public in the early days of the coronavirus pandemic with his fundraising efforts for health care workers, died Tuesday. (AP Photo/Alastair Grant)

A woman wears a face mask as she walks in a deserted Carnaby Street, in London, Wednesday, Feb. 3, 2021. Britain's Health Secretary Matt Hancock said Wednesday a new study suggesting that a single dose of the AstraZeneca vaccine may reduce transmission of COVID-19 categorically supports the government's strategy of taking more time between injections. (AP Photo/Alberto Pezzali)

AstraZeneca vaccine is ready to be used at a homeless shelter in Romford, east London, Wednesday, Feb. 3, 2021. The British health service has started to vaccinate "vulnerable" homeless people. In a study by Oxford University, the AstraZeneca vaccine has been shown to reduce transmission of the virus. (AP Photo/Frank Augstein)

A paramedic holds Sinopharm coronavirus vaccines at a vaccination center, in Peshawar, Pakistan, Wednesday, Feb. 3, 2021. Pakistani authorities started vaccinating frontline health workers on Wednesday amid a steady decline in confirmed cases and fatalities, days after Pakistan received half a million doses of the Sinopharm vaccine donated by China. (AP Photo/Muhammad Sajjad)

Shopping trollies lined up next to their owners, waiting their turn to receive a weekly pack of donated food and supplies, outside a church in Barcelona, Spain, Wednesday, Feb. 3, 2021. Food requests have increased considerably in the last months as Spain has been in lockdown due to the coronavirus pandemic. (AP Photo/Emilio Morenatti)

People wait their turn to receive a weekly pack of donated food and supplies, outside a church in Barcelona, Spain, Wednesday, Feb. 3, 2021. Food requests have increased considerably in the last months as Spain has been in lockdown to fight the coronavirus pandemic. (AP Photo/Emilio Morenatti)

A protestor carries a tray of coffee cups as several thousand owners of restaurants, bars and other businesses that have been shut down during the coronavirus pandemic rally against government measures in Zagreb, Croatia, Wednesday, Feb. 3, 2021. The protests was organized by an association of entrepreneurs who are demanding that they be allowed to work while respecting the coronavirus safety rules. (AP Photo/Darko Bandic)

In this photo released by Xinhua News Agency, a medical worker inspects COVID-19 inactivated vaccines at a packaging plant of the Beijing Biological Products Institute Co., Ltd. in Beijing on Dec. 25, 2020. China on Wednesday, Feb. 3 announced a plan to provide 10 million coronavirus vaccine doses to developing nations through the global COVAX initiative. (Zhang Yuwei/Xinhua via AP)

Dorrit Crawford, of Brooklyn, receives the first dose of the coronavirus vaccine at a pop-up COVID-19 vaccination site at the God's Battalion of Prayer Church, Wednesday, Feb. 3, 2021, in the Brooklyn borough of New York. SOMOS and Elderplan volunteer nurses are expected to vaccinate up to 500 older New Yorkers who attend the church or live in surrounding areas. (AP Photo/Mary Altaffer)