Estimated global mortality associated with the first 12 months of 2009 pandemic influenza A H1N1 virus circulation: A modelling study.
Regional R t numbers have been touted as a way to guide the further easing of restrictions, because they could allow a place that showed a resurgence in cases to be sealed off.
Ironically, lockdowns mean that many of us are not gaining immunity by having been infected, so the epidemic may spike again once social distancing measures are lifted.