Antibodies

Omicron subvarient BA.2: Here's all you need to know

Omicron is a 'highly divergent' variant which has reduced the protection of antibodies from both prior infection and vaccination, and increased transmissibility

Omicron: You may forget the COVID-19 variant but here's why your T-cells won't

The view that the immune system — prepped via either recovery from infection, or vaccination — can tackle the new variant has found support in a South African study that credits T-cells with putting up a robust defence against Omicron

Antibodies from original coronavirus strain don't bind to variants, claims study in Nature Communications journal

The finding, published in the journal Nature Communications, has implications for the ability of new variants to reinfect people who contracted earlier versions of the virus, as well as for the continuing efficacy of vaccines and the design of booster shots.

Over 86% of Mumbai's population have COVID-19 antibodies: BMC's latest sero-survey

The survey, fifth since the onset of the pandemic, was conducted between 12 August and 9 September, 2021, the civic body said in a release.

‘Combining Covishield, Covaxin elicited better defence than two doses of the same vaccine’

COVID-19: ICMR’s fourth sero survey finds 67.6% of Indians over age of six have antibodies

A third of the population did not have SARS-CoV-2 antibodies, which means about 40 crore people are still vulnerable to COVID-19 infection, the sero survey found

Pfizer vaccine protects against COVID-19 strain predominant in India but is slightly less effective, finds study

People who received two Pfizer doses saw a three-fold reduction in their antibodies against the Indian variant.

Body produces antibodies against COVID-19 for months even after a mild infection: Study

In the bone marrow, these cells continually secrete low levels of antibodies into the bloodstream to help guard against the virus.

Why you should get a COVID-19 vaccine, even after you’ve recovered from coronavirus?

Not everyone develops immunity after the infection - nine percent didn't have detectable antibodies, seven percent didn't have T cells that recognize the virus.

People over the age of 65 are more likely to suffer from COVID-19 reinfections

While initial infection with Covid-19 is more likely to bestow 80 percent protection from reinfection to those under 65 years of age.