Which infectious agent is the smallest?

bacteria
virus
fungi
prion
A prion is a single protein in a mis­fold­ed form. The prion theory was de­vel­oped to explain the dis­cov­ery that the mys­te­ri­ous in­fec­tious agent causing the diseases scrapie and Creutzfeldt–­Jakob disease resisted ionizing ra­di­a­tion. The data sug­gest­ed that the in­fec­tious agent was too small to be a virus.

Answers distribution

bacteria
virus
fungi
prion
answers
flagBelgium
5%
5%
5%
84%
19
flagItaly
9%
9%
0%
80%
21
flagthe Netherlands
4%
11%
4%
78%
61
flagFrance
8%
5%
8%
76%
34
flagRepublic of Ireland
8%
8%
9%
73%
83
flagCanada
8%
18%
4%
69%
71
flagSweden
15%
11%
0%
69%
26
flagAustralia
3%
26%
0%
69%
26
flagNorway
16%
12%
4%
68%
25
flagPoland
9%
16%
6%
67%
16306
flagGermany
9%
14%
8%
66%
189
flagMalaysia
4%
32%
0%
64%
25
flagthe United Kingdom
10%
17%
7%
62%
457
flagLithuania
7%
15%
0%
61%
26
flagIndia
8%
26%
2%
60%
340
flagSwitzerland
10%
26%
5%
57%
19
flagPakistan
4%
33%
6%
56%
48
flagthe United States
14%
23%
4%
55%
928
flagUU
8%
29%
10%
51%
37
flagthe Philippines
8%
31%
4%
50%
67

Gender

men68%
women67%
bacteria
9%
10%
virus
15%
15%
fungi
7%
6%
prion
68%
67%

Language versions

question
answers
results
flag
Which infectious agent is the smallest?
1956
57%

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