Covaxin offers protection against double mutant (B.1.617) variant
A preprint of the study carried out by ICMR and Bharat Biotech researchers has been posted in biorXiv. Preprints are yet to be peer-reviewed and published in medical journals. So…
Category: Neutralizing antibodies
COVID-19: Protection against reinfection may last only for months
The first serosurvey was carried out in August-September 2020 and the six-month follow-up was carried out in end-January to February 2021. Widespread asymptomatic infection by mid-September when the daily cases…
Moderna, Pfizer vaccines neutralise variants encoding mutations E484K or N501Y but with less potency
The results were published in the journal Nature. Both Moderna and Pfizer-BioNTech vaccines showed no significant difference in neutralising activity. Individuals immunized with either Moderna or Pfizer-BioNTech vaccines produce closely…
Oxford vaccine found safe and immunogenic even in older adults
The results were published online in The Lancet on November 19. The results are based on the study of 560 participants enrolled between May 30 and August 8. Of the…
Pre-existing memory T cells may reduce COVID-19 severity, but do not prevent infection
Pre-existing memory T cells that cross-react with SARS-CoV-2 may only reduce COVID-19 severity cannot prevent infection. The memory T cells are extremely unlikely to prevent SARS-CoV-2 infections. That is just…
A case of coronavirus reinfection in Hong Kong confirmed by genome sequencing
Using genome sequencing, researchers at the University of Hong Kong have found a rare instance of reinfection with novel coronavirus for the second time, four-and-a-half months after the first infection.…
Intranasal vaccination of a coronavirus candidate vaccine prevents infection
A new vaccine candidate construct using chimpanzee adenovirus carrying the full length of novel coronavirus spike protein is able to achieve sterilizing immunity and prevent both upper and lower respiratory…
Novel coronavirus-specific nutralising antibodies last at least for six months
The researchers found that neutralizing antibodies were over 70% even at the end of six months. While IgG showed an initial contraction but stabilised at relatively high levels over the…
