IL33 and viral infectious disease: While in a viral murine model, IL-33 has been shown to be expressed by radio-resistant cells of the spleenic T cell zone in lymphocytic choriomeningitis virus (LCMV) infection [7], the above data prompted us to compare the IL-33 expression in a natural viral infection in liver in using the serotype 3 of mouse hepatitis viral infection MHV model [23,25].