Science, asked by kb7236506, 3 months ago

who discovered vaccination a. Alexander Fleming b. Aristotle c. louis pasteur d. Robert hooke​

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Answered by reema989709
0

Answer:

option a is the correct answer of this question

Answered by ranjeetkittu88
0

Answer:

The germ theory of disease is the currently accepted scientific theory for many diseases. It states that microorganisms known as pathogens or "germs" can lead to disease. These small organisms, too small to see without magnification, invade humans, other animals, and other living hosts. Their growth and reproduction within their hosts can cause disease. "Germ" may refer to not just a bacterium but to any type of microorganism, such as protists or fungi, or even non-living pathogens that can cause disease, such as viruses, prions, or viroids.[1] Diseases caused by pathogens are called infectious diseases. Even when a pathogen is the principal cause of a disease, environmental and hereditary factors often influence the severity of the disease, and whether a potential host individual becomes infected when exposed to the pathogen.

Scanning electron microscope image of Vibrio cholerae. This is the bacterium that causes cholera.

Basic forms of germ theory were proposed in the late Middle Ages by physicians including Ibn Sina in 1025,[2] Ibn Khatima and Ibn al-Khatib in the 14th century,[3] Girolamo Fracastoro in 1546, and expanded upon by Marcus von Plenciz in 1762. However, such views were held in disdain in Europe, where Galen's miasma theory remained dominant among scientists and doctors.

By the early 19th century, smallpox vaccination was commonplace in Europe, though doctors were unaware of how it worked or how to extend the principle to other disease

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