World Health Organization Media briefing on COVID19 with Dr Tedros

"Keycap digit one we don’t know enough about immunity to COVID19.

Most people who are infected with the virus develop an immune response within the first few weeks, but we don’t know how strong or lasting that immune response is, or how it differs for different people", Dr Tedros.

" Keycap digit two the vast majority of people in most countries remain susceptible to this virus. Seroprevalence surveys suggest that in most countries, less than 10% of the population have been infected with the COVID19 virus", Dr Tedros.