The major function of the immune system is to protect the host from environmental agents such as microbes or chemicals, thereby preserving the integrity of the body. This is done by the recognition of self and response to non-self.
All of the chemical reactions in an organism required to sustain life
Answer:
[B] A middle ear infection.
Explanation:
An example of an acute disease is a middle ear infection. Acute diseases include broken bones, viruses like the flu and rotavirus, and infections like pink eye and urinary tract infections. Sometimes acute diseases can be severe and require emergency medical attention.
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