has material basis at all times resistance to infection chemical resistance to infection A resistance to infection that is conferred by the presence, in sufficient quantity, of a particular molecular entity that is not normally present in the organism. A resistance to infection that is conferred by the presence, in sufficient quantity, of a particular molecular entity that is not normally present in the organism. As with all dispositions, chemical resistance need not be realized to exist. The presence of cholorquine confers this disposition even if the person is never bitten by a mosquito, let alone a malaria-laden mosquito. Examples: chemoprophylaxis of malaria with chloroquine, treatment of infections with antibiotics, antiviral treatment William R. Hogan chemical resistance to infection chemoprotection chemoprotective resistance chemotherapeutic resistance to infection scattered molecular aggregate