Why are there so many deaths from influenza when it is generally a mild disease?

Q: Is polio a retrovirus?

A: Retroviruses are RNA viruses that invade a host cell and insert a copy of its genome into the host…

Q: Why is infection by herpesvirus permanent?

A: Introduction  Herpesviridae is a large group of DNA virus which has around 135 types found in…

Q: Which mosquito is the carrier of Zika virus?

A: Zika virus is a mosquito-borne flavivirus that was first identified in monkeys in Uganda in 1947. In…

Q: What is Corona Virus Disease 2019 (COVID 19)? What is the current situation in our country and the…

A: COVID-19 Coronavirus disease or COVID-19 is an infectious disease caused by coronavirus. This causes…

Q: Your friend and you go to Central America for spring break where you have a great time (from what…

A: Introduction :- Sickle-cell anemia is an inherited blood disorder that is caused by a genetic…

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: What are infectious diseases and means of transmission?

A: Introduction: Infectious illnesses are those that are caused by organisms such as bacteria, viruses,…

Q: Why doesn't a long lasting vaccine against common cold exist yet?

A: Common cold is most common viral infection that affect the upper respiratory tract of humans.

Q: Why are crowded living areas, such as long-term care units, prone to the spread of viral illnesses?

A: Long term care facilities are healthcare facilities that provide rehabilitation, restoration, or…

Q: Which of the following is NOT an autoimmune disorder? a) Lupus Ob) Rheumatoid Arthritis c) HIV/AIDS

A: Introduction - A disease in which the body's immune system attacks healthy cells is called…

Q: What are the steps in a lysogenic infection?

A: The lysogenic cycle is the process through which a virus replicated its DNA by using a host cell.…

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 poliovirus spread so effectively?

A: The causative agent for polio, the poliovirus is a virus that contains single stranded RNA genome…

Q: Why are infectious diseases more common in developing nations than in the United States today?

A: According to the data provided by the World Health Organization, there is a lower level of mortality…

Q: Does an insect disease vector like a mosquito have to intake blood to transmit a pathogen to a host?

A: Yes, mosquito have to intake blood to transmit a pathogen to a host because when a mosquito intake…

Q: Which of the following statements is false?a) A botulism epidemic that results from improperly…

A: An illness of high rate implies that individuals frequently contract the infection; guests to a…

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: At what specific sites within the body can the poliomyelitis virus multiply? What is the usual…

A: Virus refers to the infectious agent that replicates (or multiples) in the host cells. It comprises…

Q: What do the following viral encephalitis diseases have incommon: eastern equine encephalitis,…

A: Encephalitis is a disorder that results in the inflammation of the brain tissue. It is generally…

Q: What is the oxygen requirement of Varicella-zoster virus (VZV)?

A: Introduction  One of the nine known herpes viruses that infect people is human alphaherpesvirus 3,…

Q: All of the following are thought to contribute to the emergence of disease excepta) advances in…

A: The answer to the above question is option e i.e. widespread vaccination programs .  These vaccines…

Q: What do influenza virus and Ebola virus have in common?In what ways do their modes of transmission…

A: Ebola Virus: It is a Virus that causes a deadly and rare disease called Ebola that causes severe…

Q: What are our bodies' natural barriers to infection?

A: The immune system plays a crucial role in defending your body against pathogens, toxic chemicals,…

Q: What genetic differences make some individuals more and some less susceptible to malaria ?

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: Tuberculosis continues to be a serious health concern in many parts of the world. A) true B) false

A: An airborne infection that mainly affects the lungs, tuberculosis (TB) is contagious. Your brain and…

Q: How many strains of enterovirus are there

A: Microbiology is the field of biology that mainly deals with the study of microorganisms, their…

Q: Why would medication fail to cure HSV infections even though it prevents recurrent cold sores?

A: Herpes affected individuals are generally asymptomatic or show painful blisters and ulcers. HSV…

Q: Which of the following statements is false?a) A disease with a long incubation period might spread…

A: The immune framework is an organization of natural cycles that shields a living being from diseases.…

Q: Why is influenza such a common respiratory disease?How are influenza vaccines chosen?

A: Influenza is a common viral infection that is caused by influenza viruses that infect the nose,…

Q: Which of these statements concerning Creutzfeldt-Jakob disease(CJD) and vCJD is true?a) CJD occurs…

A: Prions or proteinaceous infectious agents are some of the protein molecule-based disease-causing…

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: What is the basic structure of the HIV virus? What is the function of the glycoproteins of its…

A: We have to explain What is the basic structure of the HIV virus? And What is the function of the…

Q: Why has it been so difficult to eradicate polio using vaccination?

A: Because , They face many challenges such as insecurity , poor health systems, and poor sanitation,…

Q: Comparing the number of infections, people catch cold so much more often than flu .Why haven’t we…

A: Vaccination is the artificial way of injecting the pathogen either dead or alive so as to prevent…

Q: What is a chronic and an infectious disease prevalent in the United States?

A: Chronic diseases are the one's who's condition lasts for year or more than a year, this may require…

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: Can you suggest some possible explanations for the patterns of influenza epidemics in temperate…

A: Experiments in guinea pigs exhibited that flu infection transmission is firmly regulated by…

Q: Which of the following infectious agents is most likely to cause a pandemic?a) Influenza A virusb)…

A: Microbes are generally visible under the microscope only. They include bacteria, algae, fungi,…

Q: What is the virus transmission, the morphology and the family name of the virus that causes Ebola?

A: The Ebola virus is a deadly virus that is responsible for causing fatal hemorrhagic fever.

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.