sentences:  Human parechoviruses cause mild, gastrointestinal or respiratory illness, but have been implicated in cases of myocarditis and encephalitis.Human parechoviruses are commonly spread and more than 95% of human cases are infected early in life, within two to five years of age.Parechovirus B has been proposed as a zoonotic virus, associated with diabetes and intrauterine fetal death in humans.