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Study shows that antibodies generated by CoronaVac COVID-19 vaccine are less effective against the P 1 Brazil variant

 E-Mail Note: this paper is being presented at the European Congress of Clinical Microbiology & Infectious Diseases (ECCMID) and is being published in The Lancet Microbe. Please credit both the congress and the journal in your stories A new study presented at this year s European Congress of Clinical Microbiology & Infectious Diseases (ECCMID) and published in The Lancet Microbe, shows that antibodies generated by CoronaVac, an inactivated COVID-19 vaccine, work less well against the P.1 Brazil (Gamma) variant. It also suggests that the P.1 variant may be able to reinfect individuals who previously had COVID-19. The SARS-CoV-2 virus spike protein is the primary target of neutralising antibodies - antibodies that block the entry of the virus into cells - including those induced by vaccines. The emergence of variants with multiple mutations in this protein has raised concerns that neutralising antibody responses, and so the effectiveness of vaccination programmes, could be

CoronaVac jab less effective against Gamma variant - study

Published July 9, 2021 7:16am Gamma s capacity to evade these immune system responses even in immunized people suggest the virus can potentially circulate in vaccinated individuals even in areas with high vaccination rates, the study authors said in a press release. PARIS, France - The Chinese CoronaVac jab, a key tool in Brazil s fight against COVID-19, is less effective against the Gamma variant first detected in the virus-ravaged South American country, a study said Friday. Researchers found that antibodies generated by the vaccine work less well against the variant than a previous coronavirus strain, while Gamma may also be able to reinfect people who had previously had the virus.

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