Viruses are small infectious agents that can only replicate inside living cells. They produce disease through different mechanisms, such as remaining dormant within the body like herpes simplex virus or causing illnesses like Epstein-Barr virus which causes glandular fever and varicella zoster virus which causes chickenpox and shingles.

1. Mónica Delgado Castillo

2.  Virus is a small infectious agent that can
replicate only inside the living cells of an
organism.

10. Viruses have different mechanisms by which
they produce disease in an organism.
 Herpes simplex virus, which causes cold
sores, to remain in a dormant state within the
human body.
 Epstein-Barr virus, which causes glandular
fever, and varicella zoster virus, which causes
chickenpox and shingles