How does it happen?

Children under the age of 2 years do not produce antibodies against the most common bacteria that cause acute otitis media (which are Streptococcus pneumoniae, and Haemophilus influenzae) little ones are very susceptible to contracting AOM. More children today are attending some form of pre-school or day-care, which means they are in contact with airborne bacteria, which can cause upper respiratory tract infections. The infection travels to the middle ear via the eustachian tube.