Los Angeles: Scientists have found the likely order in which COVID-19 symptoms first appear, an advance that may help clinicians rule out other diseases, and help patients seek care promptly or decide sooner to self-isolate.According to the study, published in the journal Frontiers in Public Health, the likely order of symptoms in patients with COVID-19 is fever, followed by cough, muscle pain, and then nausea, and/or vomiting, and diarrhea."This order is especially important to know when we have overlapping cycles of illnesses like the flu that coincide with infections of COVID-19," explained study co-author Peter Kuhn, a professor of medicine and biomedical engineering at the University of Southern California (USC) in the US.With this new.