Question

who discovered vaccine for the first time?
Name two viral diseases which can be prevented by using vaccine.
Explain the principle of immunization.​

Answer 1

Answer:

Louis Pasteur furthered the concept through his work in microbiology. The immunization was called vaccination because it was derived from a virus affecting cows (Latin: vacca 'cow'). Smallpox was a contagious and deadly disease, causing the deaths of 20–60% of infected adults and over 80% of infected children.

Explanation:

Answer 2

Answer:

Edward Jenner discovered vaccine for smallpox in 1796.

measles and polio can be prevented by using a vaccine.

Explanation:

Hope this will help you

Pls mark as brainliest