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Moderna Covid-19 vaccine confers at least 3 months immunity: Study
Moderna Covid-19 vaccine, which the company says was recently demonstrated to have 94 percent efficacy, causes the human immune system to produce potent antibodies that endure for at least three months, a study showed Thursday.Researchers at the National Institute for Allergies and Infectious Diseases (NIAID), which co-developed the drug, studied the immune response of 34 adult participants, young and old, from the first stage of a clinical trial.Writing in the New England Journal of Medicine, they said that the antibodies, which stop the SARS-CoV-2 virus from invading human cells, "declined slightly over time, as expected, but they remained elevated in all participants 3 months after the booster vaccination."The vaccine, called mRNA-1273,