Differential Household Attack Rates Mirror the Ability to Control Coronavirus Disease 2019 (COVID-19)

that was commissioned by the World Health Organization to the Cochrane Collaboration. In addition, we will upload the summary results to the trial registry as allowed by the ChiCTR platform. Winter is coming, so planning for a new wave of the COVID-19 pandemic becomes extremely urgent. We must complete the multicenter, randomized controlled clinical trial as soon as possible; otherwise, we have to withdraw this registration from the website by the end of 2020.