Modifiers matching antigen:

• indoor,
• foreign,
• infectious,
• internal,
• exogenous,
• oral,
• possible,
• strong,
• peripheral,
• dangerous,
• environmental,
• endogenous,
• particulate,
• main,
• harmless,
• lethal,
• proteinaceous,
• bacterial,
• viral,
• microbial,
• extraneous,
• outside,
• noninfectious,
• nutritional,
• active,
• single,
• simple,
• small,
• free,
• diverse,
• innocuous,
• soluble,
• several,
• extrinsic,
• harmful,
• outdoor,
• perennial,

Simple categories matching infectious:

• germ,
• disease,
• virus,
• agent,
• cyst,
• pathology,
• cause,
• process,
• microorganism,
• illness,
• std,
• fluid,
• diarrhea,
• organism,
• dermatosis,
• software,
• material,
• condition,
• complication,
• microbe,
• disorder,
• entity,
• change,
• waste,
• particle,
• nature,
• bacteria,
• substance,
• program,
• diarrhoea,
• parasite,
• pathogen,
• antigen,
• symptom,
• residue,
• secretion,
• state,