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
flagPakistan
84%
7%
3%
3%
52
flagMalaysia
83%
0%
11%
0%
18
flagRepublic of Ireland
77%
11%
11%
0%
18
flagthe United States
69%
12%
7%
9%
499
flagIndia
69%
11%
9%
7%
260
flagItaly
66%
14%
4%
14%
21
flagSouth Africa
66%
16%
8%
0%
12
flagAustralia
65%
12%
15%
7%
40
flagUnknown
64%
7%
14%
14%
14
flagthe United Kingdom
63%
12%
10%
9%
155
flagthe Netherlands
62%
12%
0%
25%
16
flagGermany
59%
17%
10%
12%
153
flagCanada
58%
12%
14%
12%
41
flagthe Philippines
54%
24%
10%
10%
37
flagNigeria
46%
33%
6%
13%
15
flagPoland
45%
16%
21%
15%
15377
flagSweden
45%
18%
18%
9%
11
flagAustria
41%
20%
20%
16%
24
flagSwitzerland
33%
17%
20%
28%
39
flagGreece
26%
60%
6%
6%
15