This paper estimates time-varying COVID-19 reproduction numbers worldwide solely based on the number of reported infected cases, allowing for under-reporting. Estimation is based on a moment condition that can be derived from an agent-based stochastic network model of COVID-19 transmission. The...

A randomized-trial of community-level mask promotion in rural Bangladesh during COVID-19 shows that the intervention tripled mask usage and reduced symptomatic SARS-CoV-2 infections, demonstrating that promoting community mask-wearing can improve public health.

With work a key vector of Covid‑19 transmission, this report examines why it is critical that occupational health and safety measures take centre stage in mitigation policies. Workers in sectors declared essential by state authorities have been mandated to continue working in physical settings...

The health costs of in-person schooling during the pandemic, if any, fall primarily on the families of students, largely due to the fact that students significantly outnumber teachers. Data from North Carolina, Wisconsin, Australia, England, and Israel covering almost 80 million person-days in...

The health costs of in-person schooling during the pandemic, if any, fall primarily on the families of students, largely due to the fact that students significantly outnumber teachers. Data from North Carolina, Wisconsin, Australia, England, and Israel covering almost 80 million person-days in...

With work a key vector of Covid‑19 transmission, this report examines why it is critical that occupational health and safety measures take centre stage in mitigation policies. Workers in sectors declared essential by state authorities have been mandated to continue working in physical settings...