Table 3.
Prevalence of Omicron and vaccination efficacy with one and two doses in the countries with presence of Omicron (as defined in Section “Countries and time periods”).
| Country | % Prevalence | Vac 1 dose | Vac 1 dose | Vac 2 doses | Vac 2 doses |
|---|---|---|---|---|---|
| Omicron | Efficacy Oct | Efficacy Dec | Efficacy Oct | Efficacy Dec | |
| Argentina | 0.83 [0.76, 0.91] | 0.03 [0.00, 0.27] | – | 0.53 [0.41, 0.62] | 0.31 [0.15, 0.43] |
| Belgium | 0.32 [0.29, 0.34] | – | – | 0.55 [0.41, 0.65] | 0.38 [0.26, 0.48] |
| Brazil | 0.58 [0.52, 0.64] | 0.20 [0.11, 0.28] | – | 0.50 [0.44, 0.55] | 0.33 [0.23, 0.41] |
| Colombia | 0.35 [0.26, 0.44] | 0.44 [0.35, 0.53] | 0.36 [0.22, 0.47] | 0.61 [0.55, 0.67] | 0.53 [0.45, 0.61] |
| Denmark | 0.47 [0.46, 0.49] | – | – | – | 0.48 [0.38, 0.57] |
| France | 0.26 [0.24, 0.27] | – | 0.46 [0.35, 0.55] | – | 0.44 [0.39, 0.49] |
| Germany | 0.13 [0.13, 0.14] | – | 0.44 [0.34, 0.53] | – | 0.66 [0.63, 0.69] |
| India | 0.33 [0.29, 0.38] | 0.19 [0.05, 0.31] | 0.07 [0.00, 0.26] | 0.54 [0.47, 0.61] | 0.49 [0.37, 0.58] |
| Italy | 0.21 [0.19, 0.22] | – | 0.66 [0.57, 0.72] | – | 0.61 [0.56, 0.65] |
| Mexico | 0.54 [0.49, 0.58] | 0.36 [0.32, 0.40] | 0.22 [0.14, 0.30] | 0.66 [0.63, 0.68] | 0.56 [0.52, 0.60] |
| Netherlands | 0.30 [0.27, 0.33] | – | 0.16 [0.00, 0.33] | 0.41 [0.26, 0.53] | 0.30 [0.19, 0.39] |
| Norway | 0.25 [0.15, 0.36] | – | – | – | 0.35 [0.11, 0.53] |
| Poland | 0.03 [0.02, 0.04] | 0.31 [0.13, 0.45] | 0.44 [0.34, 0.52] | 0.52 [0.45, 0.58] | 0.58 [0.55, 0.62] |
| Portugal | 0.23 [0.19, 0.27] | – | 0.23 [0.00, 0.44] | – | 0.33 [0.13, 0.49] |
| Romania | 0.04 [0.00, 0.08] | 0.65 [0.59, 0.70] | 0.52 [0.33, 0.65] | 0.58 [0.55, 0.61] | 0.68 [0.60, 0.74] |
| Russia | 0.29 [0.22, 0.36] | 0.55 [0.43, 0.64] | 0.30 [0.09, 0.46] | 0.44 [0.38, 0.50] | 0.46 [0.37, 0.53] |
| Slovakia | 0.10 [0.03, 0.17] | – | – | 0.50 [0.35, 0.61] | 0.55 [0.47, 0.62] |
| South Africa | 0.88 [0.81, 0.96] | 0.29 [0.15, 0.40] | 0.09 [0.00, 0.18] | 0.64 [0.56, 0.70] | 0.30 [0.23, 0.36] |
| Spain | 0.46 [0.43, 0.50] | 0.34 [0.09, 0.52] | 0.30 [0.15, 0.43] | 0.66 [0.55, 0.74] | 0.26 [0.14, 0.36] |
| Sweden | 0.34 [0.32, 0.37] | – | – | – | 0.48 [0.36, 0.57] |
| Switzerland | 0.39 [0.36, 0.41] | – | – | – | 0.51 [0.42, 0.59] |
| Turkey | 0.10 [0.08, 0.11] | – | – | 0.49 [0.42, 0.55] | 0.44 [0.34, 0.52] |
| United Kingdom | 0.66 [0.65, 0.66] | – | – | 0.36 [0.24, 0.46] | 0.21 [0.08, 0.32] |
| Vietnam | 0.02 [0.00, 0.06] | – | 0.25 [0.00, 0.50] | – | – |
When data is insufficient to meet the defined selection criteria, it is omitted and replaced by “–”. The prevalence of Omicron is replicated from Table 2 for easy reference.