Doctors are navigating through testing and treatment options for patients who may suffer from the pandemic flu, which so far has proved to be no more serious than a case of the seasonal flu—unpleasant, inconvenient, and contagious, but most people get over it. Health officials, who are worried about overwhelmed doctors and emergency rooms, stress that people should call the primary-care doctor before making an appointment. Their message: Take precautions against spreading the virus and don't panic.