Are COVID vaccines less effective in people with low-immunity?

Yes, the COVID vaccines struggle to boost the immunity against COVID in people who have a defective or suppressed immune system.

A recent study published in BMJ looked at all relevant publications and confirms this. Cancer patients and patients who have received organ transplants are at risk of inadequate protection from the vaccines.

It is important that people who have low immunity get boosters as recommended by the guidelines ( third or fourth dose).

References

BMJ. Efficacy of covid-19 vaccines in immunocompromised patients: systematic review and meta-analysis
BMJ 2022; 376 doi: https://doi.org/10.1136/bmj-2021-068632 (Published 02 March 2022)
Cite this as: BMJ 2022;376:e068632

U.K. govt. COVID-19 vaccination: a guide to booster vaccination for individuals aged 18 years and over and those aged 16 years and over who are at risk. Updated 2 February 2022.

NHS. Coronavirus (COVID-19) vaccine for people with a severely weakened immune system. Page last reviewed: 24 February 2022

Disclaimer: Please note – This blog is NOT medical advice. This blog is NOT a expert medical opinion on various topics. This blog is purely for information only and do check the sources where cited. Please DO consult your own doctor to discuss concerns and options relevant to you. The views expressed in this blog are NOT, in any way whatsoever, intended to be a substitute for professional advice. The blog is NOT previewed, commissioned or otherwise endorsed, in any way, by any organisation that the author is associated with. The views expressed in this blog likely represents some of the author’s personal views held at the time of drafting the blog and MAY CHANGE overtime, particularly when new evidence comes to light.