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Tag Archives: BioNTech

How mRNA vaccines from Pfizer and Moderna work, why they’re a breakthrough and why they need to be kept so cold

Moderna’s new mRNA vaccine is almost 94.5% effective in large-scale trials. JUSTIN TALLIS/AFP via Getty Images Sanjay Mishra, Vanderbilt University As the weather cools, the number of infections of the COVID-19 pandemic are rising sharply. Hamstrung by pandemic fatigue, economic constraints and political discord, public health officials have struggled to control the surging pandemic. But now, a rush of interim …

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