In Europe, for several centuries, measles has been a childhood infection that rarely kills. When European settlers came to the New World, however, the measles virus they brought with them killed a large portion of native populations. Explain.

Q: SARS is a disease that appeared in 2003 with epidemic features in the province of Guangdong, in east…

A: SARS is transmitted from an animal to other animals and humans. The epidemic affected around 26…

Q: How is plague transmitted? Distinguish between bubonic and pneumonic plague.

A: Plague is basically an infectious disease, which is caused due to Yersinia pestis which is a…

Q: Why did the 1918 influenza affect mostly the young and healthy?

A: VIRUS:- Influenza A virus subtype H1N1, the outbreak which it has caused are the 2009 swine flu…

Q: Why is it very unlikely that the Zika virus will become a permanent resident of Michigan?

A: Zika virus is mostly spread by the bite of Aedes mosquitoes such as Aedes aegypti and Aedes…

Q: Which of the following is not an explanation for the lack of Hepatitis C eradication? A) High rate…

A: The fact that hepatitis C strains do not exhibit broad resistance to antiviral drugs is not often…

Q: Through the example of the H5N1 virus, explain how diseases are fast spreading due to globalization…

A: Introduction We will answer the question in below step

Q: Why does it take more than a week before a mosquito just infected with yellow fever virus can…

A: Yellow fever - It is a viral fever, which is transmitted via mosquitos. It causes mild fever,…

Q: Which statement about Yersinia pestis is false?a) Conditions inside human phagocytes activate…

A: Yersinia pestis is a non-motile, rod-shaped, Gram-negative bacterium that do not consists of spores.…

Q: The first person is correct

A: A chronic infection is a type of persistent infection that is eventually cleared, while latent or…

Q: Why does the Ebola virus generate such severe symptoms in a human host? (Hint: What is the…

A: virus were some of the first replicating systems . they have evolved many times and have become more…

Q: Which statistic below is the best example of incidence of a disease? A) In 2005, 2 million…

A: Disease in a population is categorized as either prevalent or incident cases. When a person is…

Q: The average EVD case fatality rate is around 50%. Case fatality rates have varied from 25% to 90% in…

A: One of the several types of the Ebola virus can cause the severe and frequently fatal disease known…

Q: Creutzfeldt-Jakob disease:(a) Is a form of meningitis(b) Is slow to develop with a long period of…

A: Answer: Introduction: Creutzfeldt-Jakob disease may take place naturally, be inherited or prion…

Q: What organ can be affected by Hepatitis B, giving rise to the virus's name? A) Kidney B) Cervix C)…

A: Hepatitis B infection is caused by HBV. HBV stands for hepatitis B virus. The virus can be…

Q: Make a simple drawing of the functions of toll-like receptors.

A: Toll-like receptors (TLR) are a family of transmembrane receptors that serve as signaling receptors…

Q: Imagine a newly developed drug that is highly lethal against all stages in the life cycle of…

A: Step1- Toxoplasma gondii an obligate intracellular parasitic protozoan eukaryote (specifically an…

Q: Why can bird flu H5N1 infect humans?

A: Bird flu is caused by a special type of influenza virus. It rarely affects humans. But are two…

Q: what type of agent is the Variola virus? BSL...

A: Any infectious agent or microorganism (Virus, bacterium, protozoa, ETC) that can cause disease is a…

Q: Why is rabies now rare in humans when it is still so common in wildlife ?

A: The term zoonosis implies a disease that comes from another creature, yet influences people. Rabies…

Q: Why do you think tuberculosis is still a relevant and fast- growing disease in the whole wide world?

A: Tuberculosis is a major problem in the world's poorest countries. There is growing resistance to…

Q: What caused the Bubonic plague pathogens to transmit to humans?

A: Bubonic plague is an infectious fever caused by the bacterium Yersinia pestis. The disease was…

Q: Which of the following are hosts of West Nile virus which are also responsible for infecting…

A: The illness caused by micro-organisms like bacteria, parasites, fungi and acellular organisms like…

Q: Why did Sabin create an oral vaccine?    - Oral vaccine are always more effective than injected…

A: The immune system is a complicated physiological system comprised of several organs, tissues, and…

Q: Which diseases did doctors need to rule out in the process of identifying Zika as the cause of…

A: The virus that causes the Zika virus disease is mostly spread by Aedes mosquitoes. Mild fever, skin…

Q: inaction and failure to respond to the need to stop the spread of HIV transmission in the early…

A: B) hemophiliacs. Is correct answer because it is the only one in given options in which rate of…

Q: Cytomegaloviruses are a widespread and diverse group of:(a) Cytoviruses (b) Retroviruses(c)…

A: A virus is a very small submicroscopic agent that is known for causing infections in its host…

Q: Ch. 8: Which of the following is a FALSE statement about Herpes Simplex Virus 1 and 2 infections? a)…

A: Infections with the herpes simplex virus (HSV) are widespread everywhere. Infants that receive HSV…

Q: outbreak than all others combined. It also spread between countries, starting in Guinea then moving…

A: Person get infection from Ebola virus by contact with already infected faunas, for instance,…

Q: People with herpes simplex type 1 viruses often getmouth sores when they have a cold or similar…

A: A viral infection which is caused by the herpes simplex virus is known as Herpes simplex. It infects…

Q: Imagine you are a virus flying around Brooklyn and you are looking to infect people sitting at the…

A: I am a free-flying virus finding my target outside of a restaurant in Brooklyn. First, let me…

Q: How does bat migration influence the spread of Ebola.

A: Ebola is a virus that affects the blood clotting ability. The virus is called a hemorrhagic fever…

Q: The first virus studied that led to the term "filterable virus" was rabies?

A: Filterable virus is a virus that is very tiny so that they can pass through a fine-pored filter like…

Q: The virus associated with shingles may lie dormant for many years without causing infection. Where…

A: In the exposure to chickenpox, some of the virus particles settle into nerve cells neurons of…

Q: Why can’t drugs used to treat influenza, like neuraminidase inhibitors, be used to treat a wider…

A: Influenza is a viral infection, also known as flu. It is caused by influenza virus.   Symptoms :…

Q: The types of host species a particular virus can infect are referred to as its (a) assembly (b)…

A: Viruses are simple, noncellular infectious microorganisms with DNA or RNA surrounded by the coat…

Q: Why do you think there are no longer polio cases in the US, but there are some cases of influenza?

A: Vaccination is an activity during which an inactivated or killed pathogen is administered to a…

Q: What's Important characteristic features of spanish flu?

A: Spanish Influenza Pandemic of 1918 was characterized by exceptionally high mortality, especially…

Q: In 1969, a 16-year-old boy named Robert Rayford was admitted to a hospital in St. Louis, Missouri.…

A: Acquired Immuno Deficiency Syndrome (AIDS) is an immune deficiency disorder caused by a virus named…

Q: The Mystery of Legionnaire's Disease -The bicentennial convention of the American Legion was held in…

A: In the late summer of 1976, a Legionnaires disease outbreak occurred in Philadelphia. Many of the…

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.