Viruses are considered non-living because they can crystallize. Unlike living organisms, viruses are not cellular and can exist in a crystalline form outside of host cells, remaining inert until they infect a host to reproduce.
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The virus grows in living cells. Viruses require a host cell to replicate and carry out their life cycle. Once inside the cell, they use the host’s machinery to reproduce and spread to new cells.
Edward Jenner discovered the smallpox vaccine. In 1796, he used material from cowpox sores to immunize a young boy against smallpox, demonstrating the efficacy of the first successful vaccine in history.
The vaccine for smallpox was developed by Edward Jenner. In 1796, Jenner used cowpox material to create immunity against smallpox, marking the first successful vaccine. This groundbreaking work laid the foundation for modern immunology.
The virus which causes hydrophobia due to dog bite is called rabies. Rabies is a viral infection transmitted through the saliva of infected animals, most commonly dogs, and affects the nervous system.