FIG. 2.

MV-specific IgM levels in paired filter paper and plasma samples collected from clinically diagnosed measles patients in Khartoum, Sudan. The samples were tested in an IgM capture ELISA, using peroxidase-labeled MV N as the conjugate. OD450, optical density at 450 nm. ●, laboratory-confirmed measles cases; ○, nonmeasles rash disease cases.