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    Looks like non-mRNA vaccines can be as good as Pfizer and Moderna in certain scenarios

    The consensus has been that Pfizer and Moderna are most protective. But a study looking at 5 vaccines — including Russia's Sputnik V and two Chinese types — offers an unexpected finding.
    by Charles Schmidt Feb 24, 2022 4 minutes
    A health worker in Mexico City prepares a Sputnik V dose during a mass vaccination effort against COVID-19. A new study in Mexico shows that non-mRNA vaccines like the Russian version can be as effective as mRNA vaccines like Pfizer if the patient has previously been infected with SARS-CoV-2.

    More than 20 COVID vaccines are in use globally, each one based on the ancestral coronavirus SARS-CoV-2 that surfaced in Wuhan, China, over two years ago. Among them, mRNA vaccines are believed to offer the best protection against severe disease.

    "It's been clear for quite a while that none of them is as good as the mRNA vaccines that dominate the U.S. landscape," says Nathaniel Landau, a virologist at NYU Langone Health i

    n New York, referring to the Pfizer and Moderna shots.

    But a study shows that other vaccines can be as effective as mRNA shots when given to people who've had a prior SARs-CoV-2

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