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Viruses are very tiny organisms with their diameters in nanometers level. Viruses exist almost everywhere, such like in the air, soil and animal body. Human body also habors a lot of viruses, but most of them do not cause diseases. Human immune system can generate antibodies against viruses, the antibody will recognize the virus and destroy it.
Without
Viruses are very tiny organisms with their diameters in nanometers level.
Viruses exist almost everywhere, such like in the air, soil
and animal body. Human body also habors a lot of viruses, but most
of them do not
cause diseases. Human immune system can generate antibodies against
viruses, the antibody will
recognize the virus and destroy it.
Viruses are very tiny organisms with their diameters in nanometers level. Viruses exist almost everywhere, such like in the air, soil and animal body. Human body also habors a lot of viruses, but most of them do not cause diseases. Human immune system can generate antibodies against viruses, the antibody will recognize the virus and destroy it.