Unadjusted and adjusted odds ratios (ORs) generated by conditional logistic regression models for a nested sample of individuals with first-time post-vaccination infection with Omicron following third COVID-19 origin strain WA-1 monovalent mRNA vacci

<p>Abbreviations: OR: odds ratio; CI: confidence interval. Odds ratio represents odds of being a case for each 3-fold increase in end titer. Cases were defined as individuals who became infected with Omicron after receiving three COVID-19 vaccine doses. Cases and controls were matched on number of days between blood draw and third vaccine dose, and study site. <sup>a</sup>At least one chronic condition versus no chronic conditions. <sup>b</sup>Above cohort mean versus below cohort mean.*Statistically significant at alpha = 0.05.</p> <p>(DOCX)</p>