My husband and I got sick from the coronavirus in late March. We had so-called mild cases, meaning only that we weren’t hospitalized: In fact, we were sicker than we had ever been. But if you develop any symptoms on this list, including trouble breathing, persistent pain or pressure in the chest, new confusion, an inability to wake or stay awake and/or bluish lips or face, seek emergency care.A pulse oximeter can sometimes be helpful, both in flagging severe illness and in reassuring you of the opposite, my colleague Dana Goldstein says: If you feel short of breath but your oxygen level is normal, you may be able to avoid the hospital. (Tip well!) Either way, avoid contact: Whether it’s a friend or a delivery person, have the bag left outside your door, and don’t open the door until the delivery person is gone.