Artificial intelligence surveillance can be used to diagnose individual cases, track the spread of COVID-19, and help provide care. The use of AI for surveillance purposes (such as detecting new COVID-19 cases and gathering data from healthy and ill individuals) in a pandemic raises multiple...

The effect of face masks on Covid-19 transmission is crucial for the health of populations. The effectiveness of face masks in reducing the transmission of Covid-19 varies across primary evidence. To perform a quantitative meta-analysis, we collected 258 estimates from 44 primary studies...