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\nHuman parainfluenza viruses (HPIVs) commonly cause upper and lower respiratory illnesses in infants, young children, older adults, and people with weakened immune systems, but anyone can get infected. After you get infected, it takes about 2 to 7 days before you develop symptoms.
\nSymptoms of upper respiratory illness may include
\nSymptoms of lower respiratory illness may include
\nOther symptoms of HPIV illness may include
\nIf your symptoms are severe or do not improve, you should seek medical attention.
\nYou can have multiple HPIV illnesses in your lifetime.
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