How long will it take to generate robust and reliable data
on COVID-19 prevalence?
There is reasonably robust data of COVID-19 deaths in hospitals because
most people who die in hospital are tested. Deaths outside hospitals are
likely underestimated as people are dying in care homes where mortality
approaches ~40%,242 and may die
without being tested and diagnosed. It is difficult to determine
prevalence as testing practices vary so much from country to country.
Seroprevalence studies will help to collect these data.