What is the most likely explanation for why the smallpox and polio vaccines have high long-term effectiveness, while the influenza vaccine has lower effectiveness and is only effective for a shorter time period? Smallpox and polio are caused by a virus, but flu is caused by a bacterium. The smallpox and polio vaccines are manufactured using more modern techniques than the flu vaccine. The influenza virus mutates more rapidly than the smallpox and polio viruses. O The symptoms of flu are more severe than those of smallpox and polio.

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A: Virus life cycle Most viruses replicate via RNA-dependent RNA polymerases and generate new particles…

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A: The germ theory of disease This theory was proposed by Louis Pasteur in the 1850s and was later…

Q: O A contaminated catheter might be an example of an iatrogenic infection. O The size of an inoculum…

A: Iatrogenic infection, These are also known as Doctor induced infection. It is caused when a…

Q: Explain strategies for vaccine development; include in your answerthe primary drawbacks to…

A: Vaccines are preparations of whole pathogen or antigenic parts of the pathogen, which are…

Q: Which of the following statements about vaccines is NOT correct? Smallpox vaccinations are no longer…

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A: Virus is a microscopic organism which contains a protective coat and the nucleic acid. It doesn’t…

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A: A virus is a little collection of genetic material that can be either DNA or RNA and is protected by…

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A: Vaccine can be defined as a non virulent preparation from the antigenic material ,which is able to…

Q: avinger et

A: The rise of diseases like Ebola and COVID-19. It has shown that the world needs to be better…

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Q: and efficacy data for a vaccine that is greatly needed in this region." In Africa, there have been…

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Q: Why do scientists worry more about new strains of viruses like influenza and coronviruses as…

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Q: two viruses infect the same cell. This results in the production of new viruses that contain genetic…

A: Infection refers to the entry of microorganisms into a host body followed by multiplication of the…

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A: A virion is a complete viral particle made up of an exterior protein shell called a capsid and a…

Q: oply to memory cells?

A: ans 1 .  long  lived antigen - specific lymphocytes                  Memory cells are seemingly…

Q: Which of the following is NOT true about the current coronavirus global pandemic (COVID-19)…

A: The correct answer is --- The causative microbe can infect many tissue types by binding to a cell's…

Q: explain what the arguments are for keeping or destroying the smallpox virus? Which do you agree with…

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Q: the Salk vaccine require a booster?

A: The poliomyelitis virus causes Polio. The virus infects the nerve cells in the spinal cord, thereby…

Q: Anne and Betty are in a room with Casey. Casey has the disease influenza and is coughing…

A: Influenza is an infectious disease.

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.