Medical workers applaud outside Chelsea and Westminster Hospital during the weekly clap for the NHS (National Health Service) in London, Britain on April 16, 2020. (Photo by Tim Ireland/Xinhua)

Medical workers applaud outside Chelsea and Westminster Hospital during the weekly clap for the NHS (National Health Service) in London, Britain on April 16, 2020. (Photo by Tim Ireland/Xinhua)

A person hangs a banner thanking NHS (National Health Service) staff outside Chelsea and Westminster Hospital ahead of the weekly clap for the NHS in London, Britain on April 16, 2020. (Photo by Tim Ireland/Xinhua)

Photo taken on April 16, 2020 shows a dog ahead of the weekly clap for the NHS (National Health Service) in London, Britain. (Photo by Tim Ireland/Xinhua)

Medical workers applaud outside Chelsea and Westminster Hospital during the weekly clap for the NHS (National Health Service) in London, Britain on April 16, 2020. (Photo by Tim Ireland/Xinhua)

Medical workers applaud outside Chelsea and Westminster Hospital during the weekly clap for the NHS (National Health Service) in London, Britain on April 16, 2020. (Photo by Tim Ireland/Xinhua)

Medical workers applaud outside Chelsea and Westminster Hospital during the weekly clap for the NHS (National Health Service) in London, Britain on April 16, 2020. (Photo by Tim Ireland/Xinhua)

Medical workers applaud outside Chelsea and Westminster Hospital during the weekly clap for the NHS (National Health Service) in London, Britain on April 16, 2020. (Photo by Tim Ireland/Xinhua)

Medical workers applaud outside Chelsea and Westminster Hospital during the weekly clap for the NHS (National Health Service) in London, Britain on April 16, 2020. (Photo by Tim Ireland/Xinhua)

The public applaud outside Chelsea and Westminster Hospital during the weekly clap for the NHS (National Health Service) in London, Britain on April 16, 2020. (Photo by Tim Ireland/Xinhua)