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COVID vaccine for kids under 5 could be ready in weeksFebruary 1, 2022 -
Pfizer starts clinical trial for Omicron-specific vaccineJanuary 25, 2022 -
Pfizer used lower dose for COVID-19 vaccine than Moderna to reduce side effectsSeptember 8, 2021 -
Data confirms Pfizer and Moderna vaccines can cause rare heart problems in menAugust 30, 2021