HomeNewscoronavirusNo clear evidence yet on Omicron's transmissibility, immune evasion, severity in India: INSACOG

No clear evidence yet on Omicron's transmissibility, immune evasion, severity in India: INSACOG

The consortium said that while there are some indicators that the disease may be milder with Omicron, there is insufficient data to determine whether this is because of prior infections or vaccination.

December 20, 2021 / 20:53 IST
Story continues below Advertisement
Representative Image (Image: AFP)
Representative Image (Image: AFP)

There is no clear evidence yet on the transmissibility, immune evasion or severity of Omicron in India, said Indian SARS-CoV-2 Genomics Consortium (INSACOG) in its latest bulletin while noting that the variant continues to grow rapidly as a variant of concern globally.

The bulletin, dated December 13 and published on Monday, said public health measures and investigations are being conducted to look into the new variant.

Story continues below Advertisement

"At this time, there is no clear evidence regarding transmissibility, immune evasion, or severity in India," INSACOG said. It further said that while the Delta variant, including its B.1.617.2 (AY) and AY.x sublineages, continues to be the main variant of concern globally, Omicron continues to grow rapidly.

"Cases have continued to increase in South Africa, with a smaller but clear rise in hospitalizations. Pending complete genomic sequencing, in the UK, S-gene target failure has shown a very rapid increase in likely Omicron cases and this would represent a significant growth advantage against Delta," the INSACOG said.

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