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