FIG 3.

Dose-dependent inhibition of HKU1 virus entry by antibodies mHKUS-2 and mHKUS-3. Inhibition experiments were performed as described for Fig. 2 using the given amount of purified antibodies. (A and C) IFA; (B and D) real-time PCR analysis. (A and B) Viruses from passage 1; (C and D) viruses from passage 3. No antibody, 1% BSA but no antibody. mHKUS-1 and mHKUS-5 served as negative controls at concentrations of 100 μg/ml. Experiments were repeated at least twice, and one representative is shown. ND, not detected.