Coronavirus | As new clusters emerge, WHO warns virus may be here to stay {ksm} Without a vaccine, he said it could take years for the global population to build up sufficient levels of immunity, A top World Health Organization official said.

Without a vaccine, he said it could take years for the global population to build up sufficient levels of immunity, A top World Health Organization official said.

from The Hindu - International https://ift.tt/3bpiJ0E