Fig. 3

SARS-CoV-2 infection status shown across each individual paper in the heat map chart (A) (blue = included; grey = non included) then combined totals below in the bar chart (B). A In the “other” group in Abdelrazik et al. refers to exposed healthcare professionals (close contacts were a separate group in this trial too). For Cerutti et al., this refers to patients who were tested from “high risk” travel areas as deemed by the local government