Study: Pfizer COVID shots are good for 90 days only. Booster shots every 3 months

Posted on by Jesse Santiano, M.D.

The UK’s Joint Committee on Vaccination and Immunisation (JCVI) recently recommended that booster shots be given every three months.

Greece is also recommending booster shots every three months.

The emergence of the omicron variant influenced the recommendation. However, research published in the British Journal of Medicine may have provided the scientific background.

The study done in Israel concludes that COVID-19 infections rise and continue to increase 90 days after two shots of the Pfizer vaccine.

The study involved 83,057 adults who received an RT-PCR test for SARS-CoV-2 during the study period, after two (and only two, no booster) vaccine injections, at least three weeks after their second vaccine injection, and with no evidence of previous covid-19 infection.

Results:

The risk of getting COVID-19 among vaccinated people with two shots goes up after 90 days. Afterward, the risk of infection continues to go up.

Adjusted odds ratio for infection at time intervals >90 days since vaccination were significantly increased compared with the reference of <90 days: 2.37 for 90-119 days, 2.66  for 120-149 days, 2.82  for 150-179 days, and 2.82  for ≥180 days..

The results are shown in the vertical bar graph below. The colored bars represent the time frames. Days 21-89 are the first 90 days after the second vaccine, and The rest are the 30-day increments after the vaccination.

The time frames are grouped by age. (18-39, 40-59, ≥60 and all).

Positive COVID-19 test or COVID-19 infections go higher after 90 days of the second Pfizer vaccination in all ages.

Source: Israel et al.

The duration of antibody protection of COVID vaccines used to be six months.   Durable Immunity from Pfizer COVID-19 Vaccine Lasts only Six Months. Now it is three months.

Each booster shot will increase your risk for adverse reactions because of sensitization.

Are you ready for four booster shots (Russian roulettes) every year with the COVID-vaccines?

 

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Reference:

Israel et al. Elapsed time since BNT162b2 vaccine and risk of SARS-CoV-2 infection: test negative design study. BMJ 2021; 375 doi: https://doi.org/10.1136/bmj-2021-067873 (Published 25 November 2021) BMJ 2021;375:e067873. 

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