You should seek medical attention immediately if you have or develop severe symptoms such as persistent fever (lasting longer than 48 hours) or fever greater than 102 F, severe shortness of breath, severe coughing spells or coughing up blood, continuous pain or pressure in the chest, blue-colored lips or face, dizzy, lightheaded, or too weak to stand, feeling very tired or lethargic, slurred speech or seizures, feeling not well enough to stay home. If at any time you feel like you are having a medical emergency, please call 9-1-1.