Health
What Does It Mean If a Vaccine Is ‘Successful’? – WIRED
The pharma companies are all using different playbooks to test their Covid-19 shots, so the first team to claim victory may not have the best formula.
When representatives from the drug company Pfizer say that they could know as soon as the end of October if their Covid-19 vaccine works, heres what they mean: If their trial, involving perhaps as many as 44,000 people, pops just 32 of them with mild Covid-19 symptoms and a positive testand if 26 of those people got a placebo instead of the vaccinethat, potentially, is it. According to the guidelines laid out by the Food and Drug Administration, that would be an effective vaccine: 50 percent eff…
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