Eythorsson et al.: "Rate of SARS-CoV-2 Reinfection During an Omicron Wave in Iceland"; The probability of reinfection was higher among persons who had received 2 or more doses compared with 1 dose

or less of vaccine (odds ratio, 1.42; 95% CI, 1.13-1.78); 2 or more doses of vaccine were associated with a higher probability of reinfection compared with 1 dose or less.

SOURCE:

Rate of SARS-CoV-2 Reinfection During an Omicron Wave in Iceland

The probability of reinfection increased with time from the initial infection (odds ratio of 18 months vs 3 months, 1.56; 95% CI, 1.18-2.08) (Figure) and was higher among persons who had received 2 or more doses compared with 1 dose or less of vaccine (odds ratio, 1.42; 95% CI, 1.13-1.78). Defining reinfection after 30 or more days or 90 or more days did not qualitatively change the results.

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