Study shows drop among secondary school pupils and staff testing positive for COVID-19 compared to Autumn 2020 term Study shows drop among secondary school pupils and staff testing positive for COVID-19 compared to Autumn 2020 term 4 May 2021 London School of Hygiene & Tropical Medicine London School of Hygiene & Tropical Medicine https://lshtm.ac.uk/themes/custom/lshtm/images/lshtm-logo-black.png The latest round of the Schools Infection Survey (SIS) suggests a significant reduction in the percentage of secondary school pupils and staff testing positive for COVID-19 infection since schools reopened compared to last November. Share Data from the fourth round of the SIS – research jointly led by Public Health England (PHE), the Office for National Statistics (ONS) and the London School of Hygiene & Tropical Medicine (LSHTM) – tested 7,271 secondary school pupils and 2,744 staff for COVID-19 infection between 15 - 31 March. The results suggest infections fell significantly among both staff and pupils compared to previous findings in November and December 2020.