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
Y_Kistochka [10]
2 years ago
6

How were vaccines first discovered?

Biology
1 answer:
BlackZzzverrR [31]2 years ago
7 0

Explanation:

Vaccination is the administration of a vaccine to help the immune system develop protection from a disease. Vaccines contain a microorganism or virus in a weakened, live or killed state, or proteins or toxins from the organism. In stimulating the body's adaptive immunity, they help prevent sickness from an infectious disease. When a sufficiently large percentage of a population has been vaccinated, herd immunity results. Herd immunity protects those who may be immunocompromised and cannot get a vaccine because even a weakened version would harm them.[1] The effectiveness of vaccination has been widely studied and verified.[2][3][4] Vaccination is the most effective method of preventing infectious diseases;[5][6][7][8] widespread immunity due to vaccination is largely responsible for the worldwide eradication of smallpox and the elimination of diseases such as polio and tetanus from much of the world.

You might be interested in
Explain how random mutations such as those in pathogens with a mutator phenotype may arise in the DNA of an organism
Arada [10]

Answer:

A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time.

8 0
2 years ago
1. Changing environmental conditions, such as temperature or pH, can affect enzyme shape. How would this alter the enzyme's func
valentina_108 [34]

hi <3

changes in the enzyme's shape would decrease its ability to function as this would change the active site of the enzyme, meaning it is harder for it to carry out its job.

this is why we try to keep enzymes in their optimum environmental conditions so they can function their best

hope this helps :)

5 0
3 years ago
Assessment started: undefined.
Mademuasel [1]

Answer:

Resources from the ocean are found i many regions, but the majority of all resources are located in which of the following regions? continental shelf.

Explanation:

8 0
2 years ago
Which of the following accurately describes an example of how materials can move across the cell membrane through active transpo
andrey2020 [161]
Things going from low concentration to high concentration with ATP. An example would be the sodium potassium pump 
5 0
3 years ago
Please I need the answer ASAP !!!!
solniwko [45]
Producers are primary consumers and it gets 10 %
8 0
3 years ago
Other questions:
  • During interphase, the dna has replicated so the chromosomes that appear during prophase are actually doubled. the structure the
    10·1 answer
  • What happens when a cell lose control over mitosis?
    6·1 answer
  • Which of the following statements about osmosis is correct?
    13·1 answer
  • The steps or parts of a pattern of propaganda include organization, argument, publicity and ______ .
    9·1 answer
  • Which description of synapses is not correct? which description of synapses is not correct? second messengers can activate gene
    5·2 answers
  • The respiratory exchange ratio (rer) is a way of determining the body's metabolism of:
    12·1 answer
  • A farmer found that caterpillars were eating his corn. He sprayed his field with pesticide to kill them. For the first three yea
    13·1 answer
  • Why is the moon abiotic?
    8·2 answers
  • Cuál es el habitad y el nicho ecológico del cóndor andino​
    5·1 answer
  • Which substance in green plants needs to absorb sunlight during photosynthesis?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!