CD40LG and infection: Based on IgM, the cumulative infections were 1,167,003 (95% CI: 1,137,177 to 1,196,828), and the infection to case ratio was 13.5 (95% CI: 13.22 to 13.91) between 1 May and 26 June 2021 and 13.2 (95% CI: 12.94 to 13.61) from 1 May till 5 July 2021.