The β(r) curve. The β(r) curve, denoted by the solid line, represents the rate of infection in the absence of drug therapy. The dashed line depicts the decrease in the infection rate due to HAART, the β(r)(1 - ϵ) curve. The dotted line represents the maximum rate of infection.
van Gaalen and Wahl BMC Public Health 2009 9(Suppl 1):S12 doi:10.1186/1471-2458-9-S1-S12