phizer is saying that they have started trials for kids. So herd immunity is possible. https://www.cnbc.com/2021/01/22/pfizer-says-its-covid-vaccine-trial-for-

phizer is saying that they have started trials for kids. So herd immunity is possible. https://www.cnbc.com/2021/01/22/pfizer-says-its-covid-vaccine-trial-for-kids-ages-12-to-15-is-fully-enrolled.html https://www.cnbc.com/2021/01/22/pfizer-says-its-covid-vaccin...