NEW YORK (AP) — As the coronavirus epidemic worsens, U.S. health experts hope Joe Biden’s administration will put in place something Donald Trump’s has not — a comprehensive national testing strategy.
Lately, in the ongoing conversation about how to defeat the coronavirus, experts have made reference to the “Swiss cheese model” of pandemic defense.
The metaphor is easy enough to grasp: Multiple layers of protection, imagined as cheese slices, block the spread of the new coronavirus, SARS-CoV-2, the virus that causes Covid-19. No one layer is perfect; each has holes, and when the holes align, the risk of infection increases. But several layers combined — social distancing, plus masks, plus hand-washing, plus testing and tracing, plus ventilation, plus government messaging — significantly reduce the overall risk. Vaccination will add one more protective layer.
WUHAN, China (AP) — In the early days in Wuhan, the first city struck by the virus, getting a COVID test was so difficult that residents compared it to winning the lottery.
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