As coronavirus cases overwhelm hospitals, and every state is considered a "danger zone," knowing if you have the highly contagious virus is key. Who better to consult than Johns Hopkins, the private research university in Baltimore, Maryland, which has been on the forefront of tracking COVID-19 since it hit these shores? "Symptoms can begin between two and 14 days after you have been infected with the coronavirus," advises the university. "The most common symptoms are" the following. Read on—and to ensure your health and the health of others, don't miss these Sure Signs You've Already Had Coronavirus.