FIGURE 2.

Rates of hospital admissions among patients infected with Omicron compared to other variants of SARS‐CoV‐2. (A–F) Illustrate the rates in unvaccinated patients (A), fully vaccinated patients (B), vaccine‐boosted patients (C), mixed data for partially and fully vaccinated patients (D) and those who did not have known/reported vaccination status (E for Omicron vs. Delta, F for Omicron vs. multiple variants). All the studies showed lower admission rates among Omicron‐infected patients compared to the other variants, regardless of the vaccination status or doses. Some studies reported the significance of the difference between the Omicron variant and the other variants. Specifically, p < 0.0001 and 0.00007 were reported for fully vaccinated (B) and boosted patients (C), respectively (Fall et al. ⁵ ). Goga et al. ⁶ reported significantly lower admission rates among the J&J fully vaccinated and boosted patients (D) infected with Omicron compared to those infected with Delta (p < 0.001). Krutikov et al., ⁴⁷ Houhamdi et al. ⁶¹ (E) and Maslo et al. ⁴⁰ (F). reported significantly lower rates of hospitalization among Omicron‐infected patients with unknown/unreported vaccination status compared to Delta patients (p < 0.0001, p < 0.0001 and p < 0.001, respectively). When Omicron was compared with other variants (including Delta, F), the rates of hospital admissions were also reported to be significantly lower among Omicron‐infected patients by Christensen et al. ⁶⁰ (p < 0.0001 for Omicron and either Delta or Alpha), Jassat et al. ⁴¹ (p < 0.001 for Omicron and either Delta or Beta or D614G) and Dinh et al. ³⁵ (p < 0.0001 for Omicron and Alpha). In Figure F, no values are shown for some variants because the variants were not reported by these studies, not because the admission rate was 0% as illustrated in Table S4. *Rate is significantly lower for Omicron as compared to other variants (specified in the legend).