Table 2 Ratesa of SARS-CoV-2 infections per 100 person years by SARS-CoV-2 variant and site, at a rural and an urban site, South Africa, 2020-2021
Site | Person years of follow up overall | All variants Rate (95% CI) | Wuhan-Hu Rate (95% CI) | Beta Rate (95% CI) | Delta Rate (95% CI) | ||
|---|---|---|---|---|---|---|---|
Overall | Overall | Overall | Immunity-adjusted | Overall | Immunity-adjusted | ||
Overall | 1709.7 | 45.1 (42.1-48.5) | 10.2 (8.8-11.9) | 15.3 (13.5-17.2) | 16.9 (15.0-19.2) | 18.8 (16.9-21.0) | 24.5 (21.8-27.7) |
Rural site | 916.3 | 40.2 (36.3-44.5) | 4.6 (3.4-6.2) | 13.1 (11.0-15.7) | 13.8 (11.5-16.5) | 22.5 (19.6-25.8) | 26.9 (23.2-31.0) |
Urban site | 793.5 | 50.9 (46.1-56.1) | 16.8 (14.1-19.9) | 17.8 (15.1-21.0) | 21.4 (18.0-25.4) | 14.6 (12.2-17.5) | 20.6 (16.6-25.6) |