The feverish race for a coronavirus vaccine got an infusion of energy on Wednesday as Johnson & Johnson announced that it has begun the final stage of its clinical trials, the fourth company to do so in the United States, which has passed a grim milestone of 200,000 deaths from the pandemic.
Johnson & Johnson is a couple of months behind the leaders, but its vaccine trial will be by far the largest, enrolling 60,000 participants. The company said it could know by the end of this year if its vaccine works. Read more here
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