mRNA boosters extend Covid protection but wane over time: Study


New York, Oct 4 (IANS): mRNA booster immunisations extend protection against moderate and severe Covid-19 for four to five months and then its effectiveness starts waning away, says a new study.

The findings, published in The BMJ, found that in the Omicron period mRNA vaccine protection against severe Covid-19 was initially high (89 per cent) but waned after primary vaccination.

"In our new study, we looked at tens of thousands of patients in multiple states, seen over a year and a half," said researcher Brian Dixon from Indiana University.

"Our analysis provides compelling evidence, both of the effectiveness of boosting to increase immunity, and that this immunity begins to wane after four or five months, indicating additional booster doses are necessary," Dixon added.

For the study, the team analysed data from patients seen at 261 hospitals, 272 emergency departments and 119 urgent care clinics in 10 states across the US from January 17, 2021, to July 12, 2022.

The data covered periods of Omicron dominance (including subvariants BA.4 and BA.5), as well as the previous periods of Delta and pre-Delta dominance.

Focusing on the durability of boosters against hospitalisation, the study found that effectiveness increased markedly after a booster shot, waning again about four to five months after the booster.

Protection increased again following a second booster. The protection and waning pattern with Moderna and Pfizer boosters were similar.

 

  

Top Stories


Leave a Comment

Title: mRNA boosters extend Covid protection but wane over time: Study



You have 2000 characters left.

Disclaimer:

Please write your correct name and email address. Kindly do not post any personal, abusive, defamatory, infringing, obscene, indecent, discriminatory or unlawful or similar comments. Daijiworld.com will not be responsible for any defamatory message posted under this article.

Please note that sending false messages to insult, defame, intimidate, mislead or deceive people or to intentionally cause public disorder is punishable under law. It is obligatory on Daijiworld to provide the IP address and other details of senders of such comments, to the authority concerned upon request.

Hence, sending offensive comments using daijiworld will be purely at your own risk, and in no way will Daijiworld.com be held responsible.