CD4 and tuberculosis: However, our model explorations show that when including 19% (roughly the proportion of pregnant women or TB co-infected) of the patients with CD4+ between 201–350 in the ≤200 scenario will lead to the same general finding: i.e. modest initial frontloading needed to adhere to the WHO guidelines of treating all with CD4+ ≤350 cells/μl, resulting in net cost-savings around the year 2026.