Adams SH, Park MJ, Schaub JP, et al. - Young adults' medical vulnerability to severe COVID-19 illness was determined, focusing on smoking-related behavior. Using the National Health Interview Survey, pooling years 2016–2018, researchers developed a young adult subsample (aged 18–25 years). Further, they developed the medical vulnerability measure (yes vs no) guided by the Centers for Disease Control and Prevention medical indicators. Findings suggest medical vulnerability of 32% for the full sample and half that (16%) for the nonsmoking sample. This suggests notably lower young adult medical vulnerability within nonsmokers vs the full sample emphasizing the significance of smoking prevention and mitigation. Relative to female vulnerability, male vulnerability was higher in the full sample, but lower in nonsmokers. In both samples, white subgroup had higher vulnerability than Hispanic and Asian subgroups.