ACE2 and infection: ACE2 expression in acutely (mean ± SE, 1.19 ± 0.33%, p = 0.415) and chronically infected RMs (mean ± SE: 3.75 ± 0.93%, p = 0.142) was not statistically significant compared to pre infection (mean ± SE: 3.05 ± 1.07%) (Figure 12F).