1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irina [24]
3 years ago
11

A primary reason for needing a new vaccine for influenza each year is that _____. See Concept 43.4 (Page 970) A primary reason f

or needing a new vaccine for influenza each year is that _____. See Concept 43.4 (Page 970) influenza is a disease that causes the apoptosis of all memory cells mutation in the influenza virus is frequent the influenza virus might proliferate in different tissues during each subsequent year, and immune memory is limited to those tissues initially infected the first infection with influenza weakens the immune system immunity typically disappears one month after recovery from a disease
Health
2 answers:
Triss [41]3 years ago
4 0

Answer:

A primary reason for needing a new vaccine for influenza each year is that mutation in the influenza virus is frequent.

Explanation:

Influenza Viruses mutation is known as Antigenic shift.

This is the random accumulation of mutations in the haemagglutinin (HA), and to a lesser extent neuraminidase (NA) genes, recognized by the immune system. It is most pronounced in influenza A viruses.

As is the case in all RNA viruses, mutations in influenza viruses occur frequently because the virus' replication machinery does not have a proofreading mechanism. When such changes cause mutations in the antigenic sites of the HA or NA genes, which reduce or inhibit the binding of neutralizing antibodies (the basis for resolving infection in an individual), the virus may evade the immune system.

This process is the occurrence of seasonal influenza epidemics that may differ in severity and age groups affected. It also accounts for vaccine mismatch when one of the strains selected for the vaccine does not optimally match the circulating strains. As a result, annual changes in the composition of influenza vaccines are necessary.

Antigenic drift in the NA can lead to resistance against neuraminidase inhibitors. Antigenic drift may also allow a virus to cross the species barrier to a new host.

Maurinko [17]3 years ago
3 0

Answer:

Mutation in influenza virus occurs frequently.

Explanation:

It is possible for the influenza virus to increase in different tissues during each subsequent year, and immune memory is limited only to those tissues that have been initially infected.

The initial nfection with influenza weakens the immune system.

Mutation in the influenza virus occurs frequently.

You might be interested in
1. What is an electronic health record? How does it compare to an electronic medical
lesya692 [45]

Answer:

An electronic (digital) collection of medical information about a person that is stored on a computer. An electronic medical record includes information about a patient's health history, such as diagnoses, medicines, tests, allergies, immunizations, and treatment plans. ... Also called EHR and electronic health records.

An Electronic Health Record (EHR) is an electronic version of a patient's medical history, that is maintained by the provider over time and may include all of the key administrative clinical data relevant to that persons care under a particular provider, including demographics, progress notes, problems, medications, vital signs, past medical history, immunizations, laboratory data, and radiology reports

Electronic medical is medical information about a person that is stored in a computer meanwhile, An Electronic health record is an electronic version of a patient's medical history. So an EHR is different from a EMR

Explanation:

5 0
3 years ago
How does public health nursing incorporate the nursing process when identifying populations of interest at the community level?
blondinia [14]

Identifying populations of interest at the community level is done by identifying the population at risk for the problem.

<h3>What is populations ?</h3>

The term "population" usually refers to the total number of people living in a certain area, such as a city or town, region, nation, continent, or the entire world. Governments frequently use censuses, a procedure for gathering, analyzing, compiling, and releasing statistics regarding a population, to determine the size of the resident people within their jurisdiction

Population refers to a group of people who share some established characteristics, such as location, race, ethnicity, nationality, or religion, in sociology and population geography. The social science of demography involves the statistical analysis of populations.

To learn more about populations  from the given link:

brainly.com/question/19829891

#SPJ4

8 0
2 years ago
If the human body were compared to a city, then the __________ system would be the city's transportation system.
Yanka [14]
Cardiovascular system is often compared to a city.
8 0
3 years ago
what is the result of reduced blood flow to the heart caused by the build up of fatty deposits in the arteries?
andrezito [222]
I believe the answer is heart attack
3 0
3 years ago
What golf clubs are good for fairway and rough shots? help asap!
erastovalidia [21]
All I know is it’s not Woods so u have like a 60% chance of getting it correct if u don’t pick woods
5 0
3 years ago
Read 2 more answers
Other questions:
  • A 20-year-old male was at the supermarket when he fell to the ground. bystanders reported that he lost consciousness and his bod
    15·2 answers
  • List, define, and provide an example of four of the six fitness-related skills
    12·1 answer
  • A student conducted an experiment by crossing a pea plant homozygous for purple flowers with a pea plant homozygous for white fl
    8·1 answer
  • The principle of ________ states that the effect of exercise training is specific to those muscles involved in the activity.
    14·1 answer
  • Men over 45 and women over 55 should obtain ________ before beginning an exercise program.
    12·1 answer
  • Help me plz i need help
    14·1 answer
  • You accidentally cut your fingernail too far, causing a sharp pain and some bleeding. which part of your nail was injured?
    13·2 answers
  • Write a thank-you note to your cardiovascular system. Be sure to mention many different ways your cardiovascular system works ha
    11·1 answer
  • Why do people with healthy lungs take fewer breaths when exercising
    6·1 answer
  • When using the skills for critical thinking, when should you put your plan into action?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!