MUC5B and COVID-19: In the severe COVID-19 replication cohort I and cohort II, the minor T-allele frequency of MUC5B rs35705950 was 0.10 and this was significantly lower than the T-allele frequency of 0.13 in both control cohorts (cohort I: p = 0.039; OR = 0.81, CI = 0.67–0.99; and cohort II: p = 0.030; OR = 0.79, CI = 0.64–0.98; Table 3).