4. Impfdosis und die FDA - ein kluger Artikel von Vinay Prasad Aktualisiert am 02. April 2022 #Covid - booster A Fourth Covid Vaccine Dose? | City Journal The case for it is thin, but that might not stop regulators. https://www.city-journal.org/the-case-for-a-fourth-covid-vaccine-dose-is-thin?utm_source=Twitter&utm_medium=Organic_Social