ICAM1 and infection: In terms of ICAM1 expression, intravascular cytotoxic T cells (CD8+) were increased in 1/148 infections (two-way ANOVA, p-value = 0.0120) and extravascular ICAM1+ B cells were increased in IL3000 infections (two-way ANOVA, p-value < 0.0001) (Figure 4J).