Excellent diagnostic graphic: Do you have symptoms of a cold, an allergy, the flu, or COVID-19?
The only thing we might add is a reference to the fact that a newly-discovered symptom of COVID-19 is a loss of taste or smell. See article here: https://www.cnn.com/2020/03/23/health/coronavirus-symptoms-smell-intl/index.html
Find this chart from the University of Alabama at Birmingham here: https://www.uab.edu/news/youcanuse/item/11179-sorting-out-symptoms-of-covid-19-influenza-colds-and-allergies