What Is Parainfluenza?
9. When Are the “Parainfluenza Seasons?”
Colds are more common during the winter and spring, while influenza season begins in the fall, peaks in winter and ends in spring. While there are certain times of year HPIVs are most common, because there are four types, doctors may make HPIV diagnoses year-round.
That said, HPIV1 is most commonly diagnosed in the fall of odd-numbered years. HPIV2 is also more common in the fall, but less so than HPIV1 and HPIV3. HPIV3 can occur throughout the year but is most commonly detected in the spring and summer months. HPIV4 is rare and has no established seasonal patterns.
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