Mumbai :Mumbai has recorded a drastic drop in reporting of adverse events post Covid-19 vaccinations over the past several weeks. Civic officials said the initial fear and anxiety associated with the vaccines and their common side effects have settled down resulting in the drop in reports of adverse events. However, medical experts warn that such a trend may eventually lead to missing out on severe Adverse Events Following Immunisation (AEFI).In the first few months after the Covid-19 vaccination drive began on January 16, the city recorded anywhere between 5 to 15 adverse events every day. However, the daily reporting on most days now is zero. For instance, between August 1 to 7, Mumbai administered 2.91 lakh doses and recorded only seven adverse events (six with Covishield and one with Covaxin). Similarly, in the last week of July, the city administered 4.98 lakh doses and recorded 10 adverse events (all with Covishield).

AEFI’s are classified into minor, severe and serious events. Any adverse event that leads to hospitalisation is considered a serious event.

“In the initial days, there was a lot of fear associated with the vaccine, not just among the public but also among the vaccination centres,” said DrMukeshAgarwal, chairperson of Brihanmumbai Municipal Corporation’s (BMC) AEFI committee. “Therefore, centres were admitting people with all kinds of common side effects like fever, headache etc. Because of the hospitalisation, a lot of these minor adverse events were being counted as serious events,” he said.

Minor AEFI’s consisting of the common side effects like fever, mild headache, pain and swelling at the site of the injection are not actively investigated. However, all serious AEFI’s have to be investigated by the AEFI committee. Earlier the committee would investigate anywhere between 30 to 40 serious AEFI cases in a month, as many minor cases were getting hospitalised as well. Since May, the numbers dropped drastically with no cases coming up for analysis for several weeks.

Mumbai has so far administered over 7.5 million doses. According to the civic data up to June, nearly 990 adverse events and 24 fatalities have been recorded in the city. About 66 adverse events were in the severe and serious category.