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Figure 1 | Virology Journal

Figure 1

From: A focus reduction neutralization assay for hepatitis C virus neutralizing antibodies

Figure 1

(a) Typical pictures of HCVcc-infected Huh-7 cells observed under a light microscope (×40), showing the absence (on the right) and presence (on the left) of focus-forming units (FFU). (b) A sample-based neutralizing assay, showing the number of FFU in Huh-7 cells following serial dilutions of purified IgG from a HCV-positive serum sample. Neutralizing anti-HCV antibodies titers were expressed as the highest log dilution of IgG producing a 50% reduction in plaque count, as compared with controls in which the dose of virus was known.

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