Figure 5.

Uninfected (solid line) and infected (dashed line) cell concentration for an initially infected IDU who begins vitamin supplementation on day 50. In (a), a stable equilibrium results from a supplement of α = 2.0 × 1013 molecules/(μL day) which corresponds to 58 mg of daily vitamin C supplementation. In (b), a periodic cycle appears when α = 4.0 × 1013 molecules/(μL day), corresponding to 116 mg of daily vitamin C supplementation.

van Gaalen and Wahl BMC Public Health 2009 9(Suppl 1):S12   doi:10.1186/1471-2458-9-S1-S12