Table IV.

The seroprevalence of B19 antibody in HIV-positive patients and Chinese blood donors.

	Number of samples	IgG-positive (%) (95%CI)	IgM-positive (%) (95%CI)	IgG & IgM positive (95%CI)	IgG & IgM negative (95%CI)
HIV-positive blood donors	45	10 (22.2), (10.1–34.3)	2 (4.4), (0–10.4)	0	33 (73.3), (60.4–86.2)
AIDS patients	34	2 (5.9), (0–13.8)*	2 (5.9), (0–13.8)	0	30 (88.2), (77.4–99.0)*
HIV-negative blood donors**	92	30 (32.6), (23.0–42.2)	7 (7.6), (2.2–13.0)	2 (2.2), (0–5.2)	47 (51.1), (40.9–61.3)

Legend:

^*:P<0.05;

^**:10 samples tested gave borderline results.