Table 2.

Characteristics of IgG-seropositive individuals under vaccination age

Participant	Gender	Location	IgG value	IgM value	Occupation	Forest visits
1	Female	Metet	0.83	0.12	Farmer	> Once per week
2	Male	Ndzefidi	0.49	−0.04	Farmer and student	> Once per week
3	Male	Primate sanctuary	0.20	−0.05	Primate sanctuary (animal care)	> Once per week
4	Male	Ndzefidi	0.02	−0.11	Student	> Once per week

Positive IgG and IgM values (in bold) indicate a past or recent exposure to an orthopoxvirus, respectively. One participant (#1) tested positive for both anti-orthopoxvirus IgG and IgM antibodies. Note that participant #4 had a very low positive IgG value, which is considered to be an equivocal result.