The period of the limit cycle as a function of vitamin supplementation levels. As the vitamin supplementation level increases beyond αc = 2.63 × 1013 molecules/μL per day, changes in the dynamics of the limit cycles can be observed. Insets (a) and (b) show the limit cycle at α = 2.8 × 1013 and α = 4.45 × 1013, respectively. In the insets, the uninfected and infected cell concentrations are respectively represented by the solid and dashed lines.
van Gaalen and Wahl BMC Public Health 2009 9(Suppl 1):S12 doi:10.1186/1471-2458-9-S1-S12