Immunizations

Currency traders work at the foreign exchange dealing room of the KEB Hana Bank headquarters in Seoul, South Korea, Tuesday, Dec. 1, 2020. Asian stocks rose Tuesday after Chinese manufacturing improved, with investors looking ahead to U.S. Federal Reserve Chairman Jerome Powell’s appearance before legislators. (AP Photo/Ahn Young-joon)

Britain's Prime Minister Boris Johnson holds a vial of the Oxford/AstraZeneca vaccine Covid-19 candidate vaccine, known as AZD1222, at Wockhardt's pharmaceutical manufacturing facility in Wrexham, Wales, Monday, Nov. 30, 2020. (Paul Ellis/PA via AP)

People wearing face masks to help curb the spread of the coronavirus ride mopeds in Hanoi, Vietnam on Thursday, Aug. 6, 2020. Vietnamese health official said on Thursday the COVID-19 outbreak would peak in the coming ten days as the country reported another death and a score of new infections. (AP Photo/Hau Dinh)

File-This April 18, 2019, file photo shows a Zoom ad, in New York. Zoom’s videoconferencing service remains a fixture in pandemic life, but its breakneck growth is showing signs of tapering off as investors debate whether the company will be able to build upon its recent success after a vaccine enables people to intermingle again. Zoom highlighted its head-spinning success story again Monday, Nov. 30, 2020, with the release of its quarterly results for the August to October period. (AP Photo/Mark Lennihan, File)

Canadian Prime Minister Justin Trudeau speaks at a bi-weekly news conference outside Rideau cottage on the COVID-19 pandemic in Ottawa, Ontario, Friday, Nov. 27, 2020. (Adrian Wyld/The Canadian Press via AP)

FILE - In this Nov. 23, 2020 file photo, a street sign is displayed at the New York Stock Exchange in New York. Stocks are falling in the early going on Wall Street as traders return from the Thanksgiving holiday, but major indexes are still on track for hefty monthly gains. The S&P 500 slipped 0.3% shortly after the opening bell Monday, Nov. 30 weighed down by losses in energy companies and banks. (AP Photo/Seth Wenig, File)

FILE - In this July 27, 2020, file photo, nurse Kathe Olmstead prepares a shot that is part of a possible COVID-19 vaccine, developed by the National Institutes of Health and Moderna Inc., in Binghamton, N.Y. Moderna Inc. says it will ask U.S. and European regulators to allow emergency use of its COVID-19 vaccine as new study results confirm the shots offer strong protection. (AP Photo/Hans Pennink, File)

FILE - In this Wednesday, Aug. 5, 2020 file photo, healthcare workers perform tests in a tent at a drive-thru COVID-19 testing site in Antwerp, Belgium. With nothing on their agendas for months to come, organizers of music festivals in Belgium want to use their know-how to help the coronavirus vaccination campaign. The Belgian government has set up the goal to vaccine about 70 percent of the country's population, the equivalent of eight million people, when efficient COVID-19 shots become available. (AP Photo/Virginia Mayo, File)

Director of the National Intellectual Property Rights Coordination Center Steve Francis, speaks during an interview with The Associated Press, Tuesday, Nov. 24, 2020, in Arlington, Va. (AP Photo/Alex Brandon)