COVID-19 herd immunity: where are we?

 Herd immunity is a key concept for epidemic control. It states that only a proportion of a population needs to be immune (through overcoming natural infection or through vaccination) to an infectious agent for it to stop generating large outbreaks. A key question in the current COVID-19 pandemic is how and when herd immunity can be achieved and at what cost.

Answer here at Nature Reviews Immunology

Fontanet, A., Cauchemez, S. COVID-19 herd immunity: where are we?. Nat Rev Immunol (2020). https://doi.org/10.1038/s41577-020-00451-5

See also later GMO Pundit post:

mRNA vaccines – a revolutionary technology to combatCOVID-19