A Covid-19 vaccine won't be a magic bullet

Having a safe and effective vaccine is a turning point in the fight against the coronavirus pandemic. But there are many challenging steps ahead -- from making large quantities to delivery around the world -- before a vaccine can have an impact...

A Covid-19 vaccine won't be a magic bullet
Having a safe and effective vaccine is a turning point in the fight against the coronavirus pandemic. But there are many challenging steps ahead -- from making large quantities to delivery around the world -- before a vaccine can have an impact on the spread of the virus.