Despite the fatality of COVID-19, thousands of people have said they are willing to be intentionally infected with the virus.
Many volunteers have signed up on the 1Day Sooner platform, to receive an experimental vaccine and then face the coronavirus in a controlled environment.
However, critics say these trials are limited because young, healthy people do not represent the general population.
READ: Most people try to avoid covid-19.
But thousands are signing up to deliberately expose themselves