05 October,2022 03:06 PM IST | New York | IANS
Image for representational purpose only. Photo Courtesy: istock
The effects of Covid on the body are being studied and so is the effectiveness of the medication given to people for it. A new study has found that the mRNA booster immunisations given extend protection against moderate and severe Covid-19 for four-to-five months. However, after that its effectiveness starts waning away.
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.
ALSO READ
Stopped manufacturing, supply of additional Covishield doses: Serum Institute
Rheumatic disease risk high up to 1 year post a Covid infection: Study
Covid virus persists in ear for a month post infection: Study
Even mild Covid can affect sleep quality Study
Even mild Covid can affect sleep quality Study
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.
Also Read: Coronavirus and blood clots: Causes, effects and treatment
This story has been sourced from a third party syndicated feed, agencies. Mid-day accepts no responsibility or liability for its dependability, trustworthiness, reliability and data of the text. Mid-day management/mid-day.com reserves the sole right to alter, delete or remove (without notice) the content in its absolute discretion for any reason whatsoever
