RT Journal
A1 Stephenson J
T1 EMerging monkeypox
JF JAMA
JO JAMA
YR 2010
FD October 20
VO 304
IS 15
SP 1659
OP 1659
DO 10.1001/jama.2010.1451
UL http://dx.doi.org/10.1001/jama.2010.1451
AB 
Through active population-based surveillance in 9 health zones in the central DRC, where smallpox vaccination ceased in 1980, the researchers identified at least 760 confirmed cases of monkeypox between November 2005 and November 2007; infection was 5.2 less likely among those who had been vaccinated against smallpox vs those who had not (0.78 per 10 000 vs 4.05 per 10 000). These data, compared with surveillance data in the 1980s, suggest that monkeypox incidence has increased 20-fold (from 0.72 cases per 10 000 to 14.42 per 10 000) after smallpox vaccination campaigns ended.