Unadjusted and adjusted odds ratios (ORs) generated by conditional logistic regression models for a nested sample of individuals with reinfection and matched controls, stratified by vaccination status, from the HEROES/RECOVER prospective cohort of fr

<p>Abbreviations: OR: odds ratio; CI: confidence interval. Odds ratio represents odds of being a case for each 3-fold increase in end titer. <sup>a</sup>Cases were defined as individuals who became reinfected with SARS-CoV-2 while unvaccinated. Both cases and controls were unvaccinated at the time of their blood draw. <sup>b</sup>Cases were defined as individuals who became reinfected with SARS-CoV-2. Both cases and controls were unvaccinated at time of initial infection, then received 2 doses of an origin strain WA-1 monovalent COVID-19 vaccine prior to any potential reinfection. Blood draw for both cases and controls occurred after the 2nd dose. <sup>c</sup>Cases were defined as individuals who became reinfected with SARS-CoV-2. Both cases and controls were unvaccinated at time of initial infection, then received 3 doses of an origin strain WA-1 monovalent COVID-19 vaccine prior to any potential reinfection. Blood draw for both cases and controls occurred after the 3rd dose. <sup>d</sup>At least one chronic condition versus no chronic conditions. <sup>e</sup>Above cohort mean versus below cohort mean. *Statistically significant at alpha = 0.05.</p> <p>(DOCX)</p>