Modifiers matching virus:

• enteric,
• diarrhoeal,
• serious,
• chronic,
• pathogenic,
• pathological,
• persistent,
• single,
• deadly,
• special,
• smaller,
• epidemic,
• simian,
• respiratory,
• systemic,
• cold,
• multiple,
• large,
• fatal,
• eukaryotic,
• possible,
• new,
• nasty,
• threatening,
• avian,
• stable,
• opportunistic,
• infectious,
• important,
• latent,
• model,
• simple,
• incurable,
• emergent,
• complex,
• oral,
• macro,
• intestinal,
• rodlike,
• acquired,
• ubiquitous,
• usual,
• related,
• intracellular,
• complicated,
• infective,
• exotic,
• transmissible,
• microscopic,
• lethal,
• resistant,
• isometric,
• dangerous,
• active,
• harmful,
• common,
• rare,
• waterborne,
• airborne,
• endogenous,
• real,
• diverse,
• contagious,
• acute,
• prevalent,
• heterogeneous,

Simple categories matching waterborne:

• waste,
• disease,
• microbe,
• illness,
• biohazard,
• chemical,
• contaminant,
• material,
• virus,
• organism,
• microorganism,
• component,
• pathogen,
• metal,
• solid,
• particle,
• preservative,
• salt,
• agent,
• halide,
• system,
• parasite,
• bacteria,