“How did it start?” is among the many questions raised by the Covid-19 pandemic. Answering it may help prevent future pandemics. The escape of SARS-CoV-2 from a research laboratory in Wuhan, China, ...
A long-awaited new policy broadens the type of regulated viruses, bacteria, fungi and toxins, including those that could threaten crops and livestock. By Carl Zimmer and Benjamin Mueller The White ...
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