W.H.O: INFECT VOLUNTEERS FOR VACCINE

UNITED NATIONS: Deliberately infecting healthy volunteers with the virus that causes Covid-19 may speed studies of vaccines against the deadly pathogen, the World Health Organization said. So-called challenge studies, where treatments or preventatives are tested directly against the infection in informed volunteers, might speed the path of vaccines to the public. Volunteers would typically be healthy, young adults at a relatively low risk of serious disease, and would be monitored and cared for, the scientists said. Officials at Moderna Inc., where the lead vaccine is in development, aren’t enthusiastic about it. AGENCIES