“…We found 12.8% (95% CI: 11.9 -13.7%) reinfection within one year, and the median reinfection time was 5.1 years (95% CI: 4.7 -5.5 years). It was possible to match the COVID-19 mortality data with the full range of cross-protection strengths between seasonal HCoV and SARS-CoV-2, but the estimated R 0,C19 s were outside of a realistic range for very high values of cross protection, for example, a recent multi-setting study estimating the R 0,C19 to be between 3.6 and 7.3 29 . Cross-protection from seasonal HCoVs to SARS-CoV-2 did not fully explain the apparent reduced susceptibility of children to SARS-CoV-2 observed during the first wave in the UK 17,18,20,21,28 .…”