source https://www.cnn.com/2020/10/20/health/uk-coronavirus-challenge-study-intl/index.html
UK government signs contract for first coronavirus human challenge studies
The UK government has signed a contract for the first human challenge studies for the novel coronavirus, in which healthy volunteers are deliberately infected with the virus in a controlled setting, and some receive an experimental vaccine.
source https://www.cnn.com/2020/10/20/health/uk-coronavirus-challenge-study-intl/index.html
source https://www.cnn.com/2020/10/20/health/uk-coronavirus-challenge-study-intl/index.html