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The Intrinsic Factors of Disease 1
The Extrinsic Factors of Disease
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acid action adult affections agents alcohol anthrax antitoxin artiﬁcial bacillus bacteria bactericidal bites blood body carbon cause cells cent chemical chieﬂy child chlorid cholera communicable diseases contagious diseases contain cresols death defects destroy diphtheria disinfectant efﬁcient eggs epidemics especially examined factor favor ﬁeld ﬁnally ﬁnds ﬁrst ﬁsh ﬁve ﬂeas ﬂesh ﬂies ﬂy formaldehyde forms frequently germicidal heat immunity important infection inﬂuence injury inoculation inspector intestinal large numbers larvae lesions malaria measles measures medical inspection method microorganisms milk modiﬁed mosquitoes mucous mucous membranes nervous number of bacteria occur oxygen parasites particles pathogenic organisms persons poison preventive medicine produced pupils rats resistance respiratory result scarlet fever school children skin soil solution speciﬁc steam sterile substances sufﬁcient susceptible syphilis tain tapeworm temperature teria tetanus theria tion tissues toxic toxin transmitted tubercle bacilli tuberculosis typhoid fever usually various virulence virus worm wounds yellow fever