This is how effective a Covid-19 vaccine has to be for life to 'return to normal,' according to scientists
August 27, 2020 at 11:01 AM EDT
A study used a computational model to simulate the Covid-19 virus transmitting under certain conditions, including having vaccines. Here's how effective the vaccine has to be and how many people have to get it in order to end the pandemic, according to the model. Plus, how likely that scenario may be.