Indeed, as the article states: > ... the contagiousness of the virus isn’t a fixed biological constant. It’s the result of the biology of the virus interacting

Indeed, as the article states: > ... the contagiousness of the virus isn’t a fixed biological constant. It’s the result of the biology of the virus interacting with human biology, with our environments, with our society. As seasons change, as our behavior changes, so can the transmissibility of the virus. The herd immunity threshold is not one fixed target. The following article (also meant for a general audience) in the Atlantic makes many of the same points regarding the impact of dynamism and heterogeneity: https://www.theatlantic.com/health/archive/2020/07/herd-immunity-coronavirus/614035/ https://www.theatlantic.com/health/archive/2020/07/herd-immu... Unfortunately the messiness of reality makes it difficult to give clear answers to questions of public health policy and a roadmap for people who really just want a simpler and more certain timeline than the science allows.