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.

Answers distribution

smallpox
leprosy
cholera
typhus
answers
flagUkraine
77%
16%
0%
6%
31
flagIndia
75%
7%
8%
6%
185
flagCzech Republic
70%
15%
10%
5%
20
flagthe United States
68%
12%
8%
9%
525
flagAustria
68%
13%
18%
0%
22
flagSwitzerland
68%
4%
13%
13%
22
flagRepublic of Ireland
67%
8%
14%
10%
97
flagthe Philippines
64%
19%
12%
3%
31
flagCanada
63%
10%
12%
10%
55
flagthe Netherlands
62%
18%
3%
16%
61
flagthe United Kingdom
61%
14%
12%
11%
399
flagItaly
60%
13%
13%
13%
30
flagGermany
57%
12%
13%
16%
189
flagAustralia
57%
23%
15%
3%
26
flagNorway
55%
10%
20%
15%
20
flagPoland
54%
13%
18%
12%
15929
flagFrance
51%
13%
13%
18%
37
flagSweden
48%
12%
25%
9%
31
flagUnknown
40%
15%
26%
17%
615
flagLithuania
22%
16%
44%
16%
18

Gender

men47%
women50%
smallpox
47%
50%
leprosy
16%
14%
cholera
21%
21%
typhus
14%
13%

Language versions

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answers
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Which infectious human disease has been eradicated?
1136
66%

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Illustration: Andres Rueda
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