School Reopenings And Relaxed Gathering Limits Have The Biggest Impact On Covid-19 Cases
A study looking at the link between Covid-19 case resurgence and population-level intervention measures found that school reopenings and lifting bans on gatherings of more than 10 people were the most significant causes of a growing outbreak.
The study published in The Lancet Infectious Diseases journal used data from 131 countries and looked at how individual measures as well as different combinations of measures effected Covid-19 transmission up to 28 days after being introduced or lifted.
They used daily country-level estimates of the R number (reproduction number) and linked it with data on what measures those countries had in place from January 1, 2020 to July 20, 2020 to analyse changes in transmission.