What do Creutzfeldt-Jakob and mad cow disease have in common?a. Both are fatal diseases.b. Both are caused by prions.c. Both cause spongiform changes in the brain.d. All of these are correct.

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A:

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A: Ebola is a virus that leads to serious haemorrhage, failure of the organ and death.

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A: Infectious diseases are caused by microbes or pathogens.

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Q: The

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Viral Infections

Viruses are abundantly found, minute entities that have genetic material enclosed within a protein coat. The proteinaceous material enclosing the genetic material of the virus is called a capsid. The genetic material could be either DNA (deoxyribonucleic acid) or RNA (ribonucleic acid). A virus is too minute to be looked at with naked eyes and therefore visualized with the help of a microscope. They are acellular entities that require a host for processes, such as replication, transcription, translation and multiplication. Plants, animals, and bacteria act as host wherein the virus reproduce. Viruses cannot multiply outside the host's body and thus are considered nonliving outside the host body.