CD34 and infection: However, as the infection progressed to later time points, while uninfected mice maintained a fairly high proportion of human primitive CD34+ progenitors, this proportion significantly declined to values that were more than twofold lower in MVMp- and MVMi-infected mice at 90 dpi, and further, the MVMp-infected surviving mice significantly showed the lowest CD34+ proportion (close to 2%) at 120 dpi (Fig. 4B, bottom right).