Covid-19 Vaccines: What's Coming and When? - msnNOW

Some 170 Covid-19 vaccines are in development around the world, according to the World Health Organization, each one promising to protect people from the deadly coronavirus and allow them to go back to work and school.

Now, a handful are starting or nearing the final stage of testing

Depending on the results, some companies say their vaccines could be greenlighted for use as soon as this year