CD8A and myocarditis: Mortality in these groups during the acute stage can be explained by the fact that the cytokine IL-1β is involved in the overproduction of nitric oxide (NO) and monocytes when IL-6 levels are deficient; in addition, IL-2 is related to the proliferation of CD8+ T lymphocytes, cells involved in the control of parasites, and are associated with myocarditis.