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The company did not release any safety information. Normally, vaccines aren’t licensed until they show they can protect for a year or two. Paul Offit, a member of the Food and Drug Administration panel that is likely to review the vaccine for approval in December. “It’s a reasonable bet, but still a gamble that protection for two or three months is similar to six months or a year,” said Dr. But it doesn’t indicate how long protection will last or how often people might need boosters. The Pfizer announcement covers people who got two shots between July and October. While it didn’t say exactly how many of the sick had been vaccinated, the 90% efficacy figure suggests it was a very small number.
#When did pfizer announce vaccine trial#
Pfizer says that, as of last week, 94 people out of about 40,000 in the trial had gotten ill with COVID-19. How long will the vaccine protect patients? So did Pfizer’s stock deserve its double-digit percentage bump? The answers to the following five questions will help us know.ġ.
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Subscribe to KHN's free Morning Briefing.īut historically, important scientific announcements about vaccines are made through peer-reviewed medical research papers that have undergone extensive scrutiny about study design, results and assumptions, not through company press releases. “We now have a whole new class of vaccines in our hands.” Michael Watson, the former president of Valera, a subsidiary of Moderna, which is currently running advanced trials of its own mRNA vaccine against COVID-19. “This is a truly historic first,” said Dr. If mRNA vaccines can protect against COVID-19 and, presumably, other infectious diseases, it will be a momentous piece of news. A similar strategy is employed in other leading COVID-19 vaccine candidates. From there, it stimulates the immune system to make antibodies that protect against the virus. There was certainly something to crow about: Pfizer’s vaccine consists of genetic material called mRNA encased in tiny particles that shuttle it into our cells. Many news reports described the vaccine as if it were our deliverance from the pandemic, even though few details were released. Pfizer’s announcement on Monday that its COVID-19 shot appears to keep nine in 10 people from getting the disease sent its stock price rocketing.
#When did pfizer announce vaccine for free#
This story can be republished for free ( details). This story also ran on The New York Times.