NBC News:
As physicians across the country diagnose and care for a growing number of people with COVID-19, distinct patterns are emerging, giving clues about how the illness manifests itself in patients.
Very often, people start off with minor physical complaints — slight cough, headache, low-grade fever — that gradually worsen.
“Patients tend to have symptoms for about a week before either getting better, or getting really sick,” said Dr. Joshua Denson, a pulmonary medicine and critical care physician at Tulane Medical Center in New Orleans.
Denson, who estimated he’s treated 15 to 20 patients with the coronavirus, described that first phase of the illness as “a slow burn.”
