Data fuel debate over whether J&J’s one-dose Covid vaccine will measure up
Johnson & Johnson published updated early data on its Covid-19 vaccine Wednesday, showing that it provided participants in a clinical trial with at least some immunity after one dose.
The data, published in the New England Journal of Medicine, offer only hints to a tantalizing question: Could the vaccine, given as a single shot, perform as well as the vaccines that U.S. regulators have already authorized, which are given as two?
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