Which infectious human disease has been eradicated?

smallpox
leprosy
cholera
typhus
After vaccination campaigns throughout the 19th and 20th centuries, the WHO certified the eradication of smallpox in 1979. The fact that humans are the only reservoir for smallpox infection, and that carriers did not exist, played a significant role in the eradication of smallpox. So far, it is the only eradicated infectious human disease.
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Answers by country

smallpox
leprosy
cholera
typhus
answers
flagRepublic of Ireland
83%
10%
4%
2%
48
flagPakistan
81%
8%
6%
3%
61
flagMalaysia
75%
0%
20%
0%
20
flagNorway
75%
12%
12%
0%
16
flagthe Netherlands
74%
11%
0%
14%
27
flagSouth Africa
70%
15%
5%
5%
20
flagthe United States
69%
11%
7%
9%
607
flagIndia
67%
13%
9%
7%
381
flagthe United Kingdom
64%
14%
10%
7%
254
flagItaly
64%
14%
10%
10%
28
flagAustralia
63%
10%
12%
14%
57
flagGermany
58%
18%
11%
11%
727
flagthe United Arab Emirates
58%
17%
11%
5%
17
flagCanada
52%
16%
16%
12%
72
flagNigeria
51%
29%
7%
11%
27
flagAustria
50%
19%
11%
19%
104
flagthe Philippines
48%
23%
18%
9%
43
flagPoland
47%
16%
20%
15%
17498
flagSwitzerland
40%
19%
18%
20%
86
flagGreece
36%
44%
4%
16%
25