Mumbai Sero Survey Shows Higher Antibodies in Those Who Took Precaution Dose of Covid-19 Vaccine
Mumbai Sero Survey Shows Higher Antibodies in Those Who Took Precaution Dose of Covid-19 Vaccine
The second phase was conducted in the months of September and October last year and included a follow-up of those who had taken part in the first phase, a BMC release said

The second phase of the sixth sero survey in Mumbai has shown that persons who have received precautionary doses of the Covid-19 vaccine have significantly higher antibodies than those who took two doses of the vaccine, a Brihanmumbai Municipal Corporation official said on Friday.

The second phase was conducted in the months of September and October last year and included a follow-up of those who had taken part in the first phase, a BMC release said.

"About 88 per cent, or 2,733 participants in the phase-I survey, took part in the second phase. This comprised 50 per cent front line workers and 50 per cent of healthcare workers. Out of the 2, 733 participants, 59 per cent were aged 25 to 45 years, while 41 per cent were in the 45-65 segment. Of the total, 57 per cent were males and 43 per cent were females," it said.

"Only 0.7 per cent of participants had not received any dose of the Covid-19 vaccine, while 1.3 per cent had taken a single dose, 55 per cent of participants had taken both doses and 43 per cent had taken the precautionary dose. The survey found 99.9 per cent of participants to be seropositive irrespective of how many doses they had taken," it added.

Those who took two vaccine doses or those who received a precaution dose, with a history of Covid-19, showed significantly higher titre (a measure of antibody concentration) than those with no known history of Covid-19 in both cases, the release said.

"A fall in antibody titre was observed in 57 per cent of participants as compared to Phase 1. However, a significant level of antibodies were found in their body after 6 months. This has highlighted the benefit of precaution doses," the BMC release said.

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