Edited sentence: Although the symptoms resolve, the infection, if untreated, persists.Even if symptoms develop during the acute phase, they usually resolve spontaneously within 3–8 weeks in approximately 90% of individuals.In about 10% of infections the symptoms do not completely resolve and result in a so-called chronic latent or indeterminate asymptomatic phase of the disease.It usually occurs unnoticed because it is symptom free or exhibits only mild symptoms and signs that are not unique to Chagas disease.Rarely, young children (<5%), or adults die from severe inflammation/infection of the heart muscle (myocarditis) or brain (meningoencephalitis).The acute phase also can be severe in people with weakened immune systems.The acute phase lasts for the first few weeks or months of infection.The most recognized marker of acute Chagas disease is called Romaña's sign, which includes swelling of the eyelids on the side of the face near the bite wound or where the bug feces were deposited or accidentally rubbed into the eye.The signs on physical examination can include mild enlargement of the liver or spleen, swollen glands, and local swelling (a chagoma) where the parasite entered the body.The symptoms noted by the patient can include fever, fatigue, body aches, headache, rash, loss of appetite, diarrhea, and vomiting