Trial participants in the U.S. who received a second dose eight weeks after the first had 94% protection against the illness. Johnson & JohnsonJNJ-0.57%said a booster dose of its Covid-19 vaccine ...
网页链接The Wall Street Journal2021-09-21
Trial participants in the U.S. who received a second dose eight weeks after the first had 94% protection against the illness. Johnson & JohnsonJNJ-0.57%said a booster dose of its Covid-19 vaccine ...
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