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
Marysya12 [62]
3 years ago
8

Propose a hypothesis of why the flu vaccine must be given every year but for most viral infections one or two doses of the vacci

ne provides lifelong immunity.
I really need this have to type it.
Biology
2 answers:
ahrayia [7]3 years ago
6 0
The flu vaccine changes every year. The flu vaccine is based on a predicted strain that is anticipated to be the most infectious that year. Thats why people who sometimes get the vaccination still get the flu, they don't have the antibodies for the strain they were infected with.  Strains for viral disease don't change very much and usually the vaccination for them cover them well. 
Amanda [17]3 years ago
4 0

Answer:

The flu resulting due to influenza viruses get change due to a phenomenon termed as antigenic drift. These are the minor mutations or variations in the genes of the influenza virus, which can result in the modifications in the virus's surface proteins.  

It is because of the antigenic drift that an individual becomes vulnerable to infection of flu again, as antigenic drift has modified the virus to such an extent that the prevailing antibodies of the individual would not recognize and neutralize the newly formed influenza viruses.  

Thus, antigenic drift is the prime cause that why an individual gets the flu more than one time, and it is the main reason for reviewing the composition of the flu vaccine and is updated every year to overcome the infections caused by influenza viruses. This is why vaccinations of influenza virus are given every year.  

You might be interested in
javier obsevo la cabeza de una mariposa en fase de oruga y en fase adulta para saber como se alimentan
kotykmax [81]

Answer: Las orugas, larvas de mariposas y polillas, se alimentan casi exclusivamente de plantas. La mayoría de las orugas mastican felizmente las hojas, aunque algunas se alimentan de otras partes de la planta, como semillas o flores, mientras que durante la etapa de adulto, la mariposa se alimenta de néctar y pasa de ser un herbívoro a ser un importante polinizador.

Explanation:

7 0
2 years ago
Which of the following materials will burn the fastest in open air?
Stels [109]

Answer:

The third one I think

Explanation:

5 0
3 years ago
Read 2 more answers
Absorption is the process in which cells A) create food. B) make proteins. C) release wastes. D) take in nutrients.
Cloud [144]

D) take in nutrients because endocytosis is the process when a cell takes in food


3 0
3 years ago
Which of the following is a major determinant of the distribution pattern of a population?
horrorfan [7]

Answer:

a.) rate of population growth

Explanation:

The population growth rate determines how a population will be distributed in a region. Populations with a high growth rate need to occupy more spaces, in addition to needing to consume a greater volume of natural resources. As the population grows, the distribution in the region becomes more intense, the opposite also happens. When the population growth rate indicates that the population is decreasing it means that this population will need less space and therefore, its geographic distribution will be smaller, as well as its impact on the region.

3 0
2 years ago
The air people breathe resides in the lowermost layer of the atmosphere called the ____.
Vilka [71]
We live in the troposphere, which is where we get our air from
3 0
3 years ago
Other questions:
  • Which would most likely cause a person to produce antibiotics?
    15·1 answer
  • Which layer of the earth contains granite and basalt in the GREATEST abundance
    6·2 answers
  • what effect does the presence of existing soil in secondary succession have on the amount of time it takes to return to the clim
    10·1 answer
  • Chemosensitive cells in the carotid bodies and aortic bodies are sensitive to the _______. when this falls, signals are sent to
    15·1 answer
  • What is the other name of lantana​
    10·2 answers
  • How does an artificial pacemaker work?
    6·2 answers
  • What is the most common element in your body?
    13·2 answers
  • What happens to an atom decays?
    8·1 answer
  • What will be the consequence if humans continue to over-hunt elephants for their ivory
    10·2 answers
  • A habitat is:
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!