The Brihanmumbai Municipal Corporation (BMC) has revised the guidelines to test asymptomatic high-risk contacts of positive COVID-19 cases. Just two days back, the BMC decided to not test high-risk contacts of positive cases on priority, but to consider first those who show symptoms. But after facing a backlash about this, the BMC has now instructed that asymptomatic high-risk cases will be taken up for testing after five days of quarantine, instead of immediately.

Explaining this, a civic official said, "The primary symptoms of illness don't appear immediately in many infected persons. Asymptomatic cases have often been tested almost immediately, but it has also been observed that in the first five days after the infection, 'False Negatives' usually appear. These are people actually affected but their medical tests come out 'negative.' Such tests are referred to medically as 'False Negative Test'."