Mycoplasma pneumoniae primarily infects healthy individuals through respiratory transmission. Healthy people often get infected by inhaling nasal and oral secretions expelled when an infected person coughs or sneezes. After infection, it often causes pharyngitis, bronchitis, and pneumonia, with symptoms such as fever, fatigue, sore throat, headache, cough, and loss of appetite. Once infected, it is important to rest, follow the doctor's medication treatment to control symptoms, shorten the course of treatment, and recover as soon as possible.