Skip to Content

Pfizer COVID-19 Vaccine 97 Percent Effective Against Symptomatic Disease

FRIDAY, March 12, 2021 -- The Pfizer COVID-19 vaccine is 97 percent effective in preventing symptomatic disease in actual use, which is better than previously thought.

The analysis of data gathered from Jan. 17 to March 6 from Israel's vaccination campaign also showed that the vaccine is 94 percent effective against asymptomatic disease, CBS News reported.

"We are extremely encouraged that the real-world effectiveness data coming from Israel are confirming the high efficacy demonstrated in our phase 3 clinical trial and showing the significant impact of the vaccine in preventing severe disease and deaths due to COVID-19," said Luis Jodar, Ph.D., senior vice president and chief medical officer of Pfizer Vaccines.

A previous real-world study revealed that the vaccine was 94 percent effective against symptomatic disease and 92 percent effective against asymptomatic disease, CBS News reported.

CBS News Article

© 2021 HealthDay. All rights reserved.

Read this next

Response to One COVID-19 Vaccine Dose Strong in Previously Infected

FRIDAY, April 16, 2021 -- For persons with a history of previous infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the neutralizing antibody titer is...

Booster Shots a Likely Reality for COVID-19-Vaccinated Americans

FRIDAY, April 16, 2021 -- Vaccinated Americans will probably need booster shots to guard against emerging coronavirus variants in the future, a White House adviser and Pfizer said...

Hemorrhagic Stroke + COVID-19 Doubles Risk for In-Hospital Mortality

FRIDAY, April 16, 2021 -- COVID-19 ups the risk for death with hemorrhagic stroke by more than twofold, according to a study published online April 14 in PLOS ONE. Vijay M....

More News Resources

Subscribe to our Newsletter

Whatever your topic of interest, subscribe to our newsletters to get the best of in your inbox.