Binomial logistic regression analysis of such statistically significant variables indicated that with a high level of each anti-SARS-CoV-2 antibody, only three factors, namely, chronic respiratory diseases (adjusted odds ratio [aOR], 1.93; 95% confidence interval [CI], 1.06–3.52; p = 0.0308), smoking history (aOR, 3.18; 95% CI, 1.53–6.63; p = 0.0020), and COVID-19 history (aOR, 22.7; 95% CI, 4.14–124; p = 0.0003; Table 1 ), were highly significant risk factors for infectious seropositivity.
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Effectiveness of COVID-19 vaccination in healthcare workers in Shiga Prefecture, Japan.
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