APOB and COVID-19: From univariable MR studies, we inferred suggestive causal effects of lifelong higher TG levels on higher risk of COVID-19 susceptibility (OR, 1.065; 95% CI, 1.001–1.13; P = 0.045) and hospitalization (OR, 1.174; 95% CI, 1.04–1.33; P = 0.012) and a significant causal effect of TGs on COVID-19 severity (OR, 1.274; 95% CI, 1.08–1.50; P = 0.004) but could not find any causal effect of Apo-B or LDL-C levels.