Image: CNNWhat we’ve learned about Covid-19 since the pandemic
• Since the initial reporting of the novel coronavirus, medical understanding of Covid-19 has evolved significantly regarding transmission and prevention. • In December 2020, the US FDA granted emergency use authorization to Pfizer/BioNTech and Moderna vaccines after clinical trials showed over 90% effectiveness. • These early findings were critical in establishing a baseline for preventing symptomatic disease during the first wave of vaccinations.
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