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
78%
0%
15%
0%
19
flagRepublic of Ireland
75%
15%
10%
0%
20
flagthe United States
69%
12%
7%
9%
507
flagIndia
69%
11%
9%
7%
275
flagItaly
66%
14%
4%
14%
21
flagSouth Africa
66%
16%
8%
0%
12
flagUnknown
64%
7%
14%
14%
14
flagthe United Kingdom
63%
13%
10%
9%
172
flagAustralia
63%
14%
14%
7%
41
flagGermany
61%
16%
10%
10%
210
flagthe Netherlands
61%
16%
0%
22%
18
flagCanada
59%
11%
14%
11%
42
flagthe Philippines
52%
26%
10%
10%
38
flagNigeria
52%
29%
5%
11%
17
flagPoland
45%
16%
21%
15%
15867
flagAustria
42%
21%
17%
17%
28
flagSweden
41%
16%
25%
8%
12
flagSwitzerland
34%
19%
19%
26%
41
flagGreece
33%
47%
4%
14%
21