Covid-19 vaccines from Johnson & Johnson, China’s Sinopharm and Russia’s Sputnik V shot are not as effective against the new omicron variant, according to a new study.
, which has yet to be peer-reviewed, also found the decrease was less pronounced for vaccinated individuals who were previously infected with the virus.has raised concerns regarding its ability to evade protection provided by widely-used vaccines, with drugmakers tailoring their shots to target the variant while testing the effectiveness of their existing shots.
Vaccines from Moderna, AstraZeneca and Pfizer and partner BioNTech were found to still be active against omicron, but the antibody response was greatly reduced when compared with the original virus strain first detected in China, according to the study., which cover the outside of the virus and are the main targets of vaccines and treatments like monoclonal antibodies.
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