Aiden Arthurs receives the Pfizer-BioNTech Covid-19 Vaccine from Pharmacist Andrew Mac (R) at the Jewish Federation/JARC’s offices in Bloomfield Hills, Michigan, on May 13, 2021. Jeff Kowalsky | AFP | Getty Images The delta variant is the most closely watched coronavirus mutation yet and with good reason: It’s more contagious than previous variants and there’s …
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