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Viruses are extremely tiny microscopic particles with a genetic material covered by a protein coat.They are responsible for many human diseases such as AIDS,Polio,Small Pox(eradicated),Chicken pox,Mumps.....etc.Also they cause plant diseases such as rice tungro,Chlorosis,Tobacco mosaic disease,Vein banding,Breaking of flowers,Ring spot......etc.

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15y ago

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