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
flagRepublic of Ireland
79%
12%
8%
0%
24
flagMalaysia
78%
0%
15%
0%
19
flagSouth Africa
73%
13%
6%
0%
15
flagIndia
70%
11%
9%
6%
289
flagthe United States
69%
11%
7%
9%
519
flagItaly
66%
14%
4%
14%
21
flagUnknown
64%
7%
14%
14%
14
flagthe United Kingdom
63%
13%
11%
9%
193
flagthe Netherlands
61%
16%
0%
22%
18
flagAustralia
60%
13%
15%
10%
46
flagGermany
58%
17%
11%
12%
247
flagCanada
58%
13%
13%
11%
43
flagNigeria
55%
27%
5%
11%
18
flagthe Philippines
52%
26%
10%
10%
38
flagPoland
46%
16%
21%
15%
16115
flagAustria
41%
19%
19%
19%
31
flagSweden
41%
16%
25%
8%
12
flagSwitzerland
34%
20%
20%
25%
44
flagGreece
34%
43%
4%
17%
23