Study Finds Gradual Increase in Covid Infection Risk After Second Vaccine Dose

Study Finds Gradual Increase in Covid Infection Risk After Second Vaccine Dose

Results confirm that protection wanes with time and suggest a third (booster) dose might be warranted. A study published by The BMJ today finds a gradual increase in the risk of covid-19 infection from 90 days after receiving a second dose of the Pfizer-BioNTech vaccine.

The study was carried out by the Research Institute of Leumit Health Services in Israel. Israel was one of the first countries to roll out a large-scale covid-19 vaccination campaign in December 2020 but has seen a resurgence of infections since June 2021. 

The findings confirm that the Pfizer-BioNTech vaccine provided excellent protection in the initial weeks after vaccination, but suggest that protection wanes for some individuals with time.

Across the world, large-scale covid-19 vaccination campaigns are helping to control the spread of the virus, but even in countries with high vaccination rates, breakthrough infections can occur, which scientists think is due to a gradual loss of immunity over time.

Examining the time elapsed since vaccination and the risk of infection could provide important clues about the need for a third injection and its preferred timing.

To do this, the researchers examin...

Note:  If you need assistance with your subscription or would like to discuss a corporate subscription for more than 10 employees please contact us or use the chat (bottom right).

Personal
$5 / Month
Individuals at home that are reading our content for personal health care or other non-professional reasons.
Like a Starbucks a month
Personal - Single Payment
$50 for 1 Year
Individuals - reading for personal reasons who prefer to pay for one year in advance with no recurring billing.
18% discount to monthly
Professional
$12 / Month
Professionals from the healthcare industry who are subscribing on behalf of their company for work reasons.
Way better than coffee