After being over one in the first half of October, Mumbai's R-value, which reflects how rapidly the coronavirus pandemic is spreading, has dropped below one, according to researchers of the Chennai-based Institute of Mathematical Sciences.

The R-value for Covid-19 in Mumbai between October 16 and 18 was 0.94, they said. The Reproduction number, or R, refers to how many people a sick person infects on average. In other words, it can tell how 'efficiently' a virus is spreading.