NIH Fauci and BARDA Disbrow: Janssen COVID-19 Vaccine proved 77% effective in preventing severe/critical COVID-19 occurring at least 14 days after vaccination and 85% effective in preventing severe/critical COVID-19 occurring at least 28 days after vaccination.
“The Janssen COVID-19 vaccine is a very welcome addition to the arsenal of COVID-19 vaccines and other prevention strategies. When tested among 45,000 volunteers, the single-injection vaccine proved 77 percent effective in preventing severe/critical COVID-19 occurring at least 14 days after vaccination and 85 percent effective in preventing severe/critical COVID-19 occurring at least 28 days