Table 1.

Proportion of protection against human monkeypox and smallpox in individual age groups born before 1981

Age group	Fraction of total population	Protection against human monkeypox	Protection against smallpox
41-50 years	13.4%	62.4% - 58.3%	73.4% - 68.6%
51-60 years	13.9%	57.8% - 54.0%	68.1% - 63.6%
61-70 years	9.6%	53.6% - 50.1%	63.2% - 59.0%
71-80 years	7.4%	49.7% - 46.5%	58.6% - 54.7%
81-90 years	3.4%	46.1% - 43.1%	54.3% - 50.8%
91- ≥100 years	0.6%	42.8% - 40.0%	50.4% - 47.1%
Mean		50.4%	59.3%