8.3.6 Herd Immunity
22.214.171.124 Impact of non-pharmaceutical interventions (NPIs) to reduce COVID19 mortality and healthcare demand
126.96.36.199 COVID-19: What is herd immunity?
188.8.131.52.6.3 What is Herd Immunity? UK’s Strategy for Coronavirus
184.108.40.206 Boris Johnson: containment of Covid-19 ‘unlikely to work on its own’
220.127.116.11 Experts Hope Herd Immunity ‘Flattens’ The Coronavirus Curve