Effectiveness of a Fourth SARS-CoV-2 Vaccine Dose in Previously Infected Individuals from Austria

Alena Chalupka, Lukas Richter, Ali Chakeri, Ziad El-Khatib, Verena Theiler-Schwetz, Christrian Trummer, Robert Krause, Peter Willeit, Bernhard Benka, John PA Ioannidis, Stefan Pilz. Effectiveness of a Fourth SARS-CoV-2 Vaccine Dose in Previously Infected Individuals from Austria. European Journal of Clinical Investigation. 2023.  https://doi.org/10.1111/eci.14136

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