Moneycontrol PRO
Live Now |Traders Carnival 15th Edition - 3 days 12 sessions Virtual Event brought to you by Moneycontrol Pro
you are here: HomeNewsTrendsHealth

COVID-19 | R-value drops below 1 in mid-September

According to the data, the R-value of Mumbai stands at 1.09, Chennai 1.11, Kolkata 1.04, Bengaluru 1.06.

September 21, 2021 / 02:38 PM IST

R-value, which reflects how rapidly coronavirus pandemic is spreading, dropped to 0.92 by mid-September after spiralling over 1 by August-end, according to researchers.

However, the R-values of major cities, Mumbai, Kolkata, Chennai, Bengaluru, are over 1. The R-value of Delhi and Pune are below 1.

The R-values of Maharashtra and Kerala are below 1, giving a much needed relief to these two states with the highest number of active cases.

The R-value was 1.17 by the end of August. It declined to 1.11 between September 4-7 and since then it has remained under 1.

"The good news is that India's R has continued to be less than 1, as is that of Kerala and Maharashtra, the two states having the highest number of active cases," said Sitabhra Sinha of the Institute of Mathematical Sciences, Chennai.

Close

COVID-19 Vaccine

Frequently Asked Questions

View more
How does a vaccine work?

A vaccine works by mimicking a natural infection. A vaccine not only induces immune response to protect people from any future COVID-19 infection, but also helps quickly build herd immunity to put an end to the pandemic. Herd immunity occurs when a sufficient percentage of a population becomes immune to a disease, making the spread of disease from person to person unlikely. The good news is that SARS-CoV-2 virus has been fairly stable, which increases the viability of a vaccine.

How many types of vaccines are there?

There are broadly four types of vaccine — one, a vaccine based on the whole virus (this could be either inactivated, or an attenuated [weakened] virus vaccine); two, a non-replicating viral vector vaccine that uses a benign virus as vector that carries the antigen of SARS-CoV; three, nucleic-acid vaccines that have genetic material like DNA and RNA of antigens like spike protein given to a person, helping human cells decode genetic material and produce the vaccine; and four, protein subunit vaccine wherein the recombinant proteins of SARS-COV-2 along with an adjuvant (booster) is given as a vaccine.

What does it take to develop a vaccine of this kind?

Vaccine development is a long, complex process. Unlike drugs that are given to people with a diseased, vaccines are given to healthy people and also vulnerable sections such as children, pregnant women and the elderly. So rigorous tests are compulsory. History says that the fastest time it took to develop a vaccine is five years, but it usually takes double or sometimes triple that time.

View more
Show

Sinha is leading a team of researchers who calculate the R-value.

According to the data, the R-value of Mumbai stands at 1.09, Chennai 1.11, Kolkata 1.04, Bengaluru 1.06.

The Reproduction number or R refers to how many people an infected person infects on average. In other words, it tells how 'efficiently' a virus is spreading.

After the devastating second wave that saw hospitals and health infrastructure being overwhelmed by the patients infected with SARS-CoV2 coronavirus, the R-value started to decline.

During the March-May period, thousands of people died due to the infection, while lakhs were infected.

The R-value value between September 4-7 was 0.94, 0.86 between September 11-15 and 0.92 between September 14-19.

Follow our full coverage of the coronavirus pandemic here.
PTI
first published: Sep 21, 2021 02:38 pm

stay updated

Get Daily News on your Browser
Sections
ISO 27001 - BSI Assurance Mark