Moderna's COVID-19 vaccine gives immunity for at least 90 days, finds study

Moderna's mRNA-based vaccine, which it last month said was 94 percent effective, produces antibodies for at least three months, a study revealed. According to study conducted by National Institute of Allergy and Infectious Diseases (NIAID), antibodies remained elevated for three months in all participants after booster shots were ministered following fing of response after first dose. 

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Immunity stays for 90 days

study, published in New England Journal of Medicine, said antibodies h started to fe in participants days after first dose, which was expected but were triggered again after booster vaccination. study was conducted on 34 healthy ults d between 18 to 70 years, who were given two doses of vaccine 28 days apart. All participants received two injections of vaccine at a dose of 100 micrograms. 

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"At 100-μg dose, mRNA-1273 produced high levels of binding and neutralizing antibodies that declined slightly over time, as expected, but y remained elevated in all participants 3 months after booster vaccination. Binding antibody responses to spike receptor-binding domain were assessed by enzyme-linked immusorbent assay," study ted. 

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study said that serum neutralising antibodies were detected in all participants after 90 days. It said that Moderna's mRNA-1273 produced strong antibodies in younger participants than older patients, but ded it still produced a strong immune response in all patients up to 70 years of . trial studies will be reviewed by US Food and Drug ministration on December 17 before getting approval for emergency use authorisation. 

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