“…Most of the datasets were from the United Kingdom (8; 47.1% of all data sets) [15,16,28,29,33,34], and the others from Germany (4; 23.5% of all data sets) [17,27,32], Austria (3; 17.6% of all data sets) [31], and the Netherlands (2; 11.8% of all data sets) [30]. In eight data sets (47.1% of all data sets) [15,16,28,29,33,34], the Innova SARS-CoV-2 Rapid Antigen Self-Test Kit (Innova Medical Group Inc., United States [CA]; henceforth called ‘Innova’) was used. The STANDARD Q COVID-19 Ag Home Test (SD Biosensor, South Korea; distributed in Europe by Roche, Germany; henceforth called ‘Standard Q’) [30,35] and the SARS-CoV-2 Antigen Rapid Test Kit (Lepu Medical Technology, China) [31] were used in three data sets each (17.6% of all data sets).…”