Covid-19: India’s R-value below 1 since Sept, infection rate declining, says study

A medic inoculates a beneficiary during a door-to-door vaccination campaign at a residential area in Chennai on Tuesday. Pic/AFP

India's R-value, which reflects how rapidly the Coronavirus pandemic is spreading, has remained below 1 since September, suggesting that the infection rate is declining, according to a study.

The Reproduction number or R refers to how many people an infected person infects on an average. An R-value smaller than 1 means the disease is spreading slowly. The bigger the number than 1, the faster the rate of spreading of the disease in the population.

According to figures calculated by researchers of the Chennai-based Institute of Mathematical Sciences, the R-value of top 10 states with most number of active cases was below 1 till October 18. However, some of the cities continue to show a rising number of active cases. Kolkata has an R-value over 1, perhaps "unsurprising" given the mass gatherings during the (recently-concluded) Durga Puja, said Sitabhra Sinha, who is leading the research.

Bengaluru also has R-value over 1 - it has been so ever since mid-September - while the R-values of Chennai, Pune and Mumbai are just below 1. The country's R-value, calculated between September 25 and October 18, was 0.90.

After the brutal second wave of coronavirus between March to May this year, the daily COVID-19 cases have been on a decline. On Tuesday, India logged 13,058 new infections, the lowest in 231 days, according to the Union health ministry's data.

The daily rise in new coronavirus infections has been below 30,000 for 25 straight days and less than 50,000 daily new cases have been reported for 114 consecutive days now.

3,40,94,373
Total no. of Coronavirus cases in India so far

4,52,454
Total no. of deaths due to the virus in India so far

1,83,118
Total no. of active cases in India

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