Coronavirus patients may be mildly ill for more than a week before condition becomes severe

SINGAPORE (ANN): Several of the locally infected patients with no known links had seen a doctor two or three times before they were sent to hospital.

This is because the illness generally starts mild with non-specific symptoms such as cough, sore throat, slight fever and feeling tired, said Professor Leo Yee Sin, executive director of the National Centre for Infectious Diseases (NCID).