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Experts predicted that the 2019/20 flu season in the Northern Hemisphere would be a bad one. And then it wasn’t. The COVID-19 pandemic hit, international travel ground to a halt, physical distancing and mask wearing became more common, and the flu went away. Rachel Baker, PhD, who studies public health and infectious disease at Princeton […]
ZURICH (Reuters) – Vaccines from AstraZeneca, Russia’s Gamaleya Institute and Johnson & Johnson fight the coronavirus with another virus, leaving scientists concerned the shots may lose potency if annual inoculations become necessary to fight new variants. So-called viral vector shots – also used by several Chinese COVID-19 vaccine developers – use harmless modified viruses as […]