Does the AstraZeneca Vaccine Also Stop Covid Transmission?

Again: unpublished data, no details, no peer review, science-by-press-release. That ain’t good. But big, as political writers sometimes say, if true. People infected with the virus but without symptoms—asymptomatic spreaders—seem to be a reason the disease is pandemic-y. Nobody’s sure how big a reason, though. Lots of other respiratory viruses overlap symptoms and transmission—sometimes the […]

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