03-16-2021, 04:03 AM
According to this :
https://www.prevention.com/health/a35118...9-vaccine/
The two mRNA vaccines have a slight edge in efficacy; both Pfizer and Moderna report being about 95% effective against COVID-19 after the second shot in clinical trials. (For comparison, the annual flu shot is usually between 40 and 60% effective, per the CDC.) They also reduce the risk of severe illness even if you do become infected with SARS-CoV-2.
The Johnson & Johnson vaccine was found to be 85% effective against severe forms of COVID-19, which prevents hospitalization and death, per the FDA. The company’s phase 3 trial also reported no COVID-19-related deaths and no COVID-19 cases requiring medical intervention after 28 days in vaccinated participants.
AstraZeneca’s own study found its vaccine is 76% effective against COVID-19 for up to three months after just one dose. It also appears that the vaccine becomes more effective with a longer wait between doses; infections were less likely among those who received their booster more than 12 weeks after their initial shot compared to those who received theirs less than six weeks after. More research is needed to confirm the significance of these findings, however.
https://www.prevention.com/health/a35118...9-vaccine/
The two mRNA vaccines have a slight edge in efficacy; both Pfizer and Moderna report being about 95% effective against COVID-19 after the second shot in clinical trials. (For comparison, the annual flu shot is usually between 40 and 60% effective, per the CDC.) They also reduce the risk of severe illness even if you do become infected with SARS-CoV-2.
The Johnson & Johnson vaccine was found to be 85% effective against severe forms of COVID-19, which prevents hospitalization and death, per the FDA. The company’s phase 3 trial also reported no COVID-19-related deaths and no COVID-19 cases requiring medical intervention after 28 days in vaccinated participants.
AstraZeneca’s own study found its vaccine is 76% effective against COVID-19 for up to three months after just one dose. It also appears that the vaccine becomes more effective with a longer wait between doses; infections were less likely among those who received their booster more than 12 weeks after their initial shot compared to those who received theirs less than six weeks after. More research is needed to confirm the significance of these findings, however.