The six symptom groups in a sequence from least to most severe are:
Headache, loss of smell, muscle pains, cough, sore throat, chest pain, no fever. Headache, loss of smell, cough, sore throat, hoarseness, fever, loss of appetite. Headache, loss of smell, loss of appetite, diarrhea, sore throat, chest pain, no cough. Headache, loss of smell, cough, fever, hoarseness, chest pain, fatigue. Headache, loss of smell, loss of appetite, cough, fever, hoarseness, sore throat, chest pain, fatigue, confusion, muscle pain.
Headache, loss of smell, loss of appetite, cough, fever, hoarseness, sore throat, chest pain, fatigue, confusion, muscle pain, shortness of breath, diarrhea, abdominal pain.
The last three types are tied with the most severe disease, the researchers noted. The range of those with severe symptoms who need help breathing range from about 9% to 20%, while those with milder symptoms who need breathing aids range from 2% to 3%.
Also, nearly half of the patients with the most severe symptoms ended up in a hospital, compared with 16% of those with the least severe symptoms, the findings showed.
