Close to 15 per cent of Quebecers had antibodies for COVID-19: study

An evaluation reveals youthful individuals have been extra more likely to present indicators of an infection on the finish of the second wave.

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Roughly 15 per cent of Quebec adults developed antibodies for the COVID-19 virus on the finish of the second wave of the pandemic final March, a examine suggests.

The authors of the second examine on the seroprevalence of blood donors, carried out by Héma-Québec, be aware that the primary examine, carried out on the finish of the primary wave in spring 2020, confirmed that solely 2.2. per cent of the individuals examined amongst blood donors had developed antibodies.

The Héma-Québec examine signifies individuals developed these antibodies after having been contaminated with COVID-19 for the reason that starting of the pandemic or after having been vaccinated. When excluding those that acquired a vaccine, researchers discovered roughly 10 per cent of the inhabitants developed antibodies resulting from an an infection.

The findings additionally verify that the big majority of individuals vaccinated developed antibodies towards the virus. The second examine was based mostly on a pattern of seven,924 individuals aged 18 and over who gave blood between Jan. 25 and March 11.

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Based mostly on these outcomes, the examine signifies near 600,000 individuals age 20 to 69 developed antibodies for COVID-19 after an an infection for the reason that starting of the pandemic.

An essential discovering of the examine is that on the finish of the second wave, solely a small proportion of the inhabitants was immunized, stressing the significance of vaccination packages.

The evaluation of outcomes reveals that the speed of seroprevalence was greater among the many younger and diminished progressively with age. It was 19 per cent for these age 18 to 24; 16.7 per cent for these age 25 to 39; 14.4 per cent for these age 40 to 59; 9.8 per cent for these age 60-69; and 9.5 per cent for these 70 and older.

Seroprevalence was at 16.9 per cent for girls and 12.5 per cent for males.

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The areas of Laval and Montreal recorded the very best charges of seroprevalence, at 18.5 per cent and 16.7 per cent, respectively.

The examine reveals that seroprevalence in Mauricie–Centre-du-Québec, at 15.8 per cent, was greater than the Quebec common. Chaudière-Appalaches was shut behind at 15.6 per cent.

Different areas had ranges beneath the provincial common.

A 3rd examine shall be carried out within the coming months, on the request of Quebec’s public well being division. The research are carried out with the collaboration of the Institut nationwide de santé publique (INSPQ) and the provincial working group on immunization for COVIDl-19.

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