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Pfizer’s covid-19 vaccine is highly effective, but don’t expect to get it soon

The drug maker says it will have enough vaccine to immunize only 20 million people by the end of the year, raising questions about who will get it.
by Antonio Regalado

A promising vaccine against covid-19 has proved 90% effective, protecting most people who get it, according to the drug maker Pfizer.

If the results hold up, it would mean a potential path out of the covid-19 crisis, which has shuttered business and schools across the world. However, supplies of the vaccine are likely to be limited until well into 2021, meaning most people won’t be able to get it anytime soon.


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