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Viruses cause many diseases in plants and animals. For example the human virus diseases include acquired immune deficiency syndrome (AIDS), burkitt's lymphoma, chickenpox, the common cold, conjuctivitis, creutzfeldt-jacob disease (CJD), encephalitis, enterovirus disease, gastrointestinal infections, glandular fever, hepatitis, herpes simplex, infectious mononucleosis, influenza, kuru, lassa fever, measles, mumps, polio, rabies, respiratory infections, rubella (german measles), shingles, smallpox, some cancers, warts and yellow fever.
However, viruses also bring some benefits.
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