Europeans brought many diseases to the Americas. Which disease did they carry back?

Tuberculosis
Smallpox
Typhus
Syphilis
Syphilis was present in the Americas before European contact. It was carried from the Americas to Europe by the returning crewmen from Christopher Columbus's voyage. The first outbreak of syphilis in Europe occurred in 1494 in Naples, Italy, during a French invasion.
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Tuberculosis
Smallpox
Typhus
Syphilis
answers
flagSwitzerland
0%
9%
11%
77%
44
flagthe United Arab Emirates
2%
16%
8%
72%
36
flagthe Netherlands
7%
12%
10%
69%
88
flagRussia
0%
22%
10%
67%
40
flagItaly
0%
25%
12%
62%
48
flagSweden
10%
18%
12%
60%
50
flagAustria
5%
17%
17%
58%
34
flagthe United Kingdom
6%
16%
20%
56%
600
flagDenmark
3%
18%
21%
56%
32
flagCanada
5%
30%
10%
55%
60
flagGermany
4%
20%
20%
54%
309
flagRepublic of Ireland
6%
16%
24%
52%
90
flagthe United States
7%
28%
12%
51%
576
flagUkraine
8%
21%
15%
51%
80
flagPoland
7%
19%
24%
49%
20368
flagNorway
14%
17%
23%
44%
34
flagIndia
5%
36%
14%
42%
214
flagAustralia
8%
43%
2%
40%
37
flagFrance
13%
31%
17%
37%
45
flagUnknown
12%
26%
34%
26%
1010