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]
3 years ago
6

How were vaccines first discovered?

Biology
1 answer:
BlackZzzverrR [31]3 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
For how many minutes should you flush your eyes if they come in contact with acetic acid?
ANTONII [103]
If your eyes happen to come into contact with acetic acid, you should immediately wash your eyes with water for no less than 15 minutes
3 0
3 years ago
Read 2 more answers
removing seeds from cotton plants was a slow job until eli whitney invented the cotton gin what is cotton gin
Fudgin [204]
A mechanic invented by eli whitney that removes seeds from cotton much more more quickly and effectively than by hand.
8 0
2 years ago
Most of all cells enzymes are
Over [174]

Most of all cell enzymes are proteins

5 0
3 years ago
How do fish maintain depth in water
GREYUIT [131]

For a fish to be buoyant, or float, it must displace less water or the same amount of water as its own body mass. ... Many fish use swim bladders to help them with quick depth changes. These bladders fill with air to help fish rise or release air so fish can sink, often in conjunction with forward movement.

6 0
3 years ago
Read 2 more answers
Como se dice ''tissue fluid'' en castellano (español)?​
BigorU [14]

Answer:

fluidos de tejidos

Explanation:

i hope this helps

6 0
3 years ago
Other questions:
  • How do some hormones affect only certain cells in the body but not others?
    10·1 answer
  • How many ribosomes are actively synthesizing proteins at any instant in an
    7·1 answer
  • Which statement about subatomic particles is not true
    13·2 answers
  • why are digital wave signals a more reliable way of communicating information than analog wave signals
    5·1 answer
  • Where do the electrons entering photosystem ii come from?
    7·1 answer
  • Which statements describe the pyrimidines in DNA?
    7·1 answer
  • 5. Which of these types of environments experiences
    6·1 answer
  • Listen<br> State one way scientists could use the banding patterns produced by gel electrophoresis.
    8·1 answer
  • Outline the levels of organization starting with the smallest, organisms.
    12·1 answer
  • . What process is shown in the figure below?​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!