Therapeutic Solutions International, Inc. reported new data from its ongoing investigations into the immunological mechanisms by which QuadraMune functions as a potential antiviral nutraceutical. In mice receiving QuadraMune for a period of two weeks, a significantly increased cytotoxic T cell response was seen after immunization with proteins that resemble virally associated proteins. T cytotoxic cells are a component of the immune system which selectively kills virally infected cells. Successful immunity to viruses is dependent on T cytotoxic cell activity.