Moderna says a study showed falling COVID-19 immunity over time and a need for boosters - even though most 'breakthrough' infections weren't severe

Moderna says a study showed falling COVID-19 immunity over time and a need for boosters - even though most 'breakthrough' infections weren't severe

Business Insider

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Moderna says the data provides evidence boosters could stop thousands of cases - but most "breakthrough" infections after its shot weren't severe.

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