FIG. 5.
(A) Nasal and lung titers of hMPV shed in challenge of previously infected cotton rats. The animals were previously inoculated with 20% sucrose (mock) or 105 PFU live virus (hMPV). All animals were infected with live hMPV 21 days later and sacrificed 4 days postinfection. The error bars indicate SEM. (B) Virus neutralizing antibody titers of cotton rats in the two groups from panel A. Horizontal lines indicate mean titers. All comparisons by Student's t test, two-tailed, assuming unequal variance.