What Is Parainfluenza?
2. What Are the Types of Parainfluenza?
For simplicity’s sake, HPIVs are categorized as HPIV1, HPIV2, HPIV3 and HPIV4. However, all types cause infection either in the upper airway or lower respiratory tract. HPIVs 1 and 2 cause upper airway infections. HPIV1 is the leading cause of croup in children and is most rampant in August. Symptoms may include ear infection and sore throat.
HPIV3 causes lower respiratory tract infections. It is often associated with bronchitis and pneumonia. Though it causes the most infections in spring and summer, doctors diagnosis it throughout the year. HPIV4 is rare and, therefore, not as well understood.
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