The Janssen COVID-19 vaccine developed by Johnson & Johnson is highly effective in preventing severe cases of COVID-19. In clinical trials, the vaccine was found to be 66.9% effective in preventing moderate to severe cases of COVID-19, and 100% effective in preventing hospitalizations and deaths due to the disease. Additionally, the vaccine has been found to be safe and well-tolerated, with no serious adverse events reported.

Is the J&J vaccine more effective?

According to the CDC, the Johnson & Johnson/Janssen COVID-19 Vaccine is 72% effective in preventing moderate to severe COVID-19 illness across all regions in the United States. This is slightly lower than the effectiveness of the other two authorized vaccines, but it still provides strong protection against the virus.

Is Janssen vaccine less effective?

According to the Centers for Disease Control and Prevention (CDC), the Johnson & Johnson/Janssen COVID-19 Vaccine is 72% effective in preventing severe COVID-19 illness and 85% effective in preventing hospitalization and death. The vaccine also appears to be highly effective in preventing COVID-19 transmission, with efficacy of 66% two weeks after the first dose.