According to a model developed by California physician Larrimore Cummins. based on CDCs assumptions and Public Health Service data. found that infant mortality would be substantially reduced by testing women of childbearing age in community and migrant health centers. The model assumes 3.6 million women of childbearing age visit community and migrant health centers over a 1year period. Women in this age group give birth to approximately two infants. the national average. during their childbearing years. but that the clinic is only available to. intervene in one of those two births. The prevalence rate of HIV infection among this population is 0.3 percent. or 1 in 500.