New, improved COVID-19 vaccines are on the way

More than 40 vaccines are undergoing clinical trials in the US, employing a number of different approaches to protect people from coronavirus.

COVID-19 vaccine

Here are four things to know about  what vaccines are on the way and how some could be better than what’s available now.

1. What kinds of vaccines are in the works?

So far, 38 vaccines have been approved around the world, and the US has approved three of those.

There are 

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