Answer :
When microorganisms enter the body, reproduce, and cause damage, an infection develops.
The spread and development of bacteria inside the body. Bacteria, viruses, yeast, fungi, and other microbes are examples of possible germs. Infections can start anywhere in the body and have the potential to spread everywhere. Depending on where in the body it develops, an infection might result in fever and other medical issues.
Pathogens can infect their hosts in a number of different ways. The most obvious method involves causing direct tissue or cell damage during reproduction, usually by producing toxins that let the virus enter newly formed tissues or leave cells where it had been reproducing.
Thus, when large number of microorganism infect the body it is called infection.
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