Table 1. Statistics of I_TOT the total number of COVID-19 cases per thousand inhabitants on 10 January 2022 since the beginning of the pandemic.

Four variables are considered: the unweighted number, the numbers weighted by the proportion of aged people (w_A), by the number of hospital beds per inhabitant (w_B) or both (w). The coefficient of variation c_v = σ/μ is calculated for each variable (with σ the standard deviation and μ the mean). The variation coefficients of the weighted numbers are then compared to the unweighted ones. Statistics are provided five ensembles (Europe, America, Eastern and Southern Asia and Africa), and for the whole world.

Cases	I TOT			$I_{TOT}^{w_A}$				$I_{TOT}^{w_B}$				$I_{TOT}^w$
Region	μ	σ	$c_v^0$	μ	σ	$c_v^A$	$c_v^A/c_v^0$	μ	σ	$c_v^B$	$c_v^B/c_v^0$	μ	σ	c v	$c_v/c_v^0$
Europe	146.50	56.88	0.39	582.6	235.9	0.40	1.04	187.8	106.6	0.57	1.46	751.6	452.3	0.60	1.55
America	70.28	47.86	0.68	491.2	275.0	0.56	0.82	227.8	145.0	0.64	0.93	1873.4	1566.1	0.84	1.23
Eastern Asia	26.43	29.88	1.13	251.0	403.4	1.61	1.42	54.2	42.5	0.78	0.69	523.2	484.6	0.93	0.82
Southern Asia	67.05	63.14	0.94	830.3	863.4	1.04	1.10	198.1	169.3	0.85	0.91	2862.7	3321.4	1.16	1.23
Africa	13.39	21.85	1.63	207.9	309.1	1.49	0.91	51.1	58.4	1.14	0.70	878.6	850.3	0.97	0.59
World	65.76	68.31	1.04	463.7	508.5	1.10	1.06	139.9	134.2	0.96	0.92	1342.1	1835.9	1.37	1.32