In revised home isolation guideines, the BMC on Thursday made institutional quarantine mandatory for all aged above 50 years, citing a high mortality rate of 10.8 per cent in the age group. There will be no exceptions even for those without co-morbidities or symptoms. Homes and common passages in the building will be sanitised when a case detected.

While the number of active cases is declining, the mortality rate remains high at 5 per cent. Till now, home isolation was recommended for those below 60 years without symptoms or with mild ones, without co-morbidities and having a separate toilet to themselves. "The mortality is very high for the age group of 50 to 60 years. The revised guidelines are based on the government of India's guidelines of July 2," said Dr Mangla Gomare, executive health officer of BMC. The mortality rate for those below 50 years is 1.7 per cent and for those above is 10.8 per cent. These people must get admitted to a Corona Care Centre 2 (CCC2).