Healthcare workers acknowledge applause and cheers from people outside the St. Paul's Hospital on World Health Day in Vancouver, Canada, April 6, 2020. (Photo by Liang Sen/Xinhua)

Healthcare workers acknowledge applause and cheers from people outside the St. Paul's Hospital on World Health Day in Vancouver, Canada, April 6, 2020. (Photo by Liang Sen/Xinhua)

A healthcare worker acknowledges applause and cheers from people outside the St. Paul's Hospital on World Health Day in Vancouver, Canada, April 6, 2020. (Photo by Liang Sen/Xinhua)

Healthcare workers acknowledge applause and cheers from people outside the St. Paul's Hospital on World Health Day in Vancouver, Canada, April 6, 2020. (Photo by Liang Sen/Xinhua)

People applaud and cheer for the healthcare workers outside St. Paul's Hospital on World Health Day in Vancouver, Canada, April 6, 2020. (Photo by Liang Sen/Xinhua)

A woman applauds and cheers for the healthcare workers outside St. Paul's Hospital on World Health Day in Vancouver, Canada, April 6, 2020. (Photo by Liang Sen/Xinhua)

Healthcare workers acknowledge applause and cheers from people outside the St. Paul's Hospital on World Health Day in Vancouver, Canada, April 6, 2020. (Photo by Liang Sen/Xinhua)

Healthcare workers acknowledge applause and cheers from people outside the St. Paul's Hospital on World Health Day in Vancouver, Canada, April 6, 2020. (Photo by Liang Sen/Xinhua)