Table 2. Seroprevalence of SFTS according to underlying diseases in patients who visited a tertiary hospital located in southeastern Korea, 2015.

Underlying diseases*	No. of patients tested	No. of seropositive patients by ELISA (%)
Non-malignant disease
without immunosuppressive therapy	670	10 (1.5)
with immunosuppressive therapy†	34	0 (0.0)
Malignant disease
without chemotherapy or immunosuppressive therapy	219	6 (2.7)
with chemotherapy or immunosuppressive therapy‡	74	4 (5.4)
HIV infection	12	0 (0.0)
Health checkup	55	2 (3.6)
Information not available	5	0 (0.0)

SFTS = severe fever with thrombocytopenia syndrome, ELISA = enzyme-linked immunosorbent assay, HIV = human immunodeficiency virus.

^*Seropositive rates were not significantly different among underlying diseases (P = 0.283); ^†Includes patients who have received immunosuppressive therapy within recent 3 months from acquisition of serum sample for ELISA; ^‡Includes patients who have received chemotherapy or immunosuppressive therapy within recent 3 months from acquisition of serum sample for ELISA.