Pfizer vaccine much less efficient in opposition to COVID-19 in children aged 5-11: Study

The effectiveness of the Pfizer COVID-19 vaccine for kids waned shortly in the course of the Omicron surge within the US, particularly amongst these aged 5 to 11 years, however the preventive was nonetheless protecting in opposition to extreme illness, in line with a examine. Researchers from the New York State Division of Well being and the College at Albany Faculty of Public Well being, US, estimated the effectiveness of Pfizer vaccine in opposition to COVID instances and hospitalisations.

They used information from 852,384 fully-vaccinated youngsters of 12-17 years of age and 365,502 youngsters aged 5-11 years throughout December, 2021 and January, 2022.

The yet-to-be peer-reviewed examine, posted on the preprint repository MedRxiv on Monday, discovered that the effectiveness of the Pfizer pictures in opposition to an infection attributable to the Omicron variant fell from 68 per cent to simply 12 per cent in youngsters 5 to 11 years previous inside one month of being totally vaccinated.

Effectiveness in opposition to hospitalisation in the identical age group was greater but additionally dropped considerably, falling from 100 per cent in early December to simply 48 per cent by the tip of January.

The examine additionally discovered that whereas vaccine effectiveness fell for older youngsters and teenagers, it fell extra slowly than it did for smaller youngsters.

The vaccine effectiveness waned from 66 per cent in early December to 51 per cent by the tip of January for kids within the age group of 12 to 17, the researchers stated.

For hospitalisations, vaccine effectiveness fell from 85 per cent to 73 per cent over the identical time-frame, they stated.

“In the Omicron era, the effectiveness against cases of BNT162b2 (Pfizer) declined rapidly for children, particularly those 5-11 years,” the authors of the examine stated.

“However, vaccination of children 5-11 years was protective against severe disease and is recommended,” they added.

The researchers stated these outcomes spotlight the potential want to check different vaccine dosing for kids and the continued significance layered protections, together with masks carrying, to forestall an infection and transmission.

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Revealed on: Tuesday, March 01, 2022, 05:41 PM IST

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