Shizue Akita, left, who died of COVID-19 at an Osaka hospital on May 13, 2021, and her husband Yukihiko Akita smile at Yukihiko's birthday party in Tondabayashi, western Japan, November 2019. As she struggled to breathe, Shizue Akita had to wait more than six hours while paramedics searched for a hospital in Osaka that would treat her worsening COVID-19. When she finally got to one that wasn’t overwhelmed with other patients, doctors diagnosed severe pneumonia and organ failure and sedated her. Akita, 87, was dead two weeks later. (Kazuyuki Akita via AP)

French robot "Pepper the droid" looks at the signal from a staff member at the exhibition "Robots – The 500-Year Quest to Make Machines Human" in the Hong Kong Science Museum, Wednesday, May 19, 2021. (AP Photo/Kin Cheung)

FILE - In this April 19, 2021, file photo, a restaurant staff member, center, stands in the middle of a street to promote her establishment at one of the famous commercial districts in Osaka, western Japan, as some of the businesses have closed under the government measures against the coronavirus. Hospitals in Osaka, Japan’s third-biggest city and only 2 1/2 hours by bullet train from Summer Olympics host Tokyo, are overflowing with coronavirus patients. About 35,000 people nationwide - twice the number of those in hospitals - must stay at home with the disease, often becoming seriously ill and sometimes dying before they can get medical care. (AP Photo/Hiro Komae, File)

People wearing face masks walk by the city hall in Osaka, western Japan, May 14, 2021. Hospitals in Osaka, Japan’s third-biggest city and only 2 1/2 hours by bullet train from Summer Olympics host Tokyo, are overflowing with coronavirus patients. About 35,000 people nationwide - twice the number of those in hospitals - must stay at home with the disease, often becoming seriously ill and sometimes dying before they can get medical care. (Kyodo News via AP)

Naoki Hodo, a 45-year-old funeral director, wearing protective gear, stands when he administers a funeral service for one who passed away due to the coronavirus, in Sakai, western Japan, on May 8, 2021. The bereaved family could never touch the body or even see the face of the deceased before cremation. Hodo said that in April an emergency operator refused to send an ambulance for his 85-year-old aunt, telling the family to call back when they found a hospital themselves. His aunt had a badly swollen eye and hadn’t eaten for two days. (Daiki Tanaka via AP)

A nurse and her patient watch a performance by the Brasilia Philharmonic Orchestra, from the inner court of the HRAN Reference Hospital for COVID-19 in Brasilia, Brazil, Thursday, May 20, 2021. The concert is in honor of health professionals who work on the front lines to combat the pandemic. (AP Photo/Eraldo Peres)

The Brasilia Philharmonic Orchestra performs at the HRAN Reference Hospital for COVID-19 in Brasilia, Brazil, Thursday, May 20, 2021. The concert is in honor of health professionals who work on the front lines to combat the pandemic. (AP Photo/Eraldo Peres)

An elderly woman reacts as she receives a dose of COVAXIN vaccine for COVID-19 at a vaccination centre in Mumbai, India, Thursday, May 20, 2021. India’s vaccination drive is faltering just at the time when it is needed the most. The number of daily administered doses has fallen by about half over the last six weeks, from a high of 4 million a day on April 2 to around 2 million or less this week. (AP Photo/Rajanish kakade)

An Indian Lambada tribal woman adjusts her face mask as she stands outside her home in Hyderabad, India, Thursday, May 20, 2021. India has the second-highest coronavirus caseload after the U.S. with more than 25 million confirmed infections. (AP Photo/Mahesh Kumar A.)

In this picture tweeted by the Duke and Duchess of Cambridge, Britain's Prince William receives his coronavirus vaccine in London, Tuesday, May 18, 2021. (Kensington Palace via AP)