Over 80 researchers said that the idea of herd immunity is a dangerous notion unsupported by the scientific evidence.
A community is considered to have herd immunity when enough people have built up a protection against a pathogen.
This is through natural infection or through a vaccine.
For instance, in measles, which is an extremely contagious virus, about 90 percent of the community needs to be protected to prevent transmission.
As of now, no one knows exactly how many people need to be protected to stop the COVID-19 pandemic from spreading.