👉 Mononucleosis, also known as mono or a single nucleotide mismatch disorder (SNMD), is a condition in which the body's immune system mistakenly attacks and destroys healthy cells. It typically affects people between the ages of 6 months to 3 years old.
The symptoms of mononucleosis can vary depending on the severity of the infection, but common signs include:
1.
Sore throat
: The soreness is often accompanied by a dry, runny nose.
2.