WASHINGTON, United States (AFP) — US health authorities on Wednesday authorized the use of synthetic antibodies developed by AstraZeneca to prevent Covid-19 infections in people who react badly to vaccines. It was the first time the Food and Drug Administration has given emergency authorization for such a purely preventative treatment. The FDA warned the drug Evusheld is “not a substitute for vaccination in individuals for whom Covid-19 vaccination is recommended” and can only be authorized […]