Mycoplasma pneumoniae is infectious. In fact, we need to understand what Mycoplasma pneumoniae is: it is a relatively small microorganism that can live independently, positioned between bacteria and viruses. Mycoplasma pneumoniae is spread through the respiratory tract—normal people can become infected by inhaling secretions expelled through coughing, sneezing, laughing, or talking loudly by someone who has Mycoplasma pneumoniae pneumonia. Transmission mainly occurs via the respiratory route. Clinically, it is common to find sequential or simultaneous occurrences of Mycoplasma pneumoniae among inhabitants of a dormitory or members of a household. Mycoplasma pneumoniae pneumonia is widespread globally, and most cases are sporadic, with regional outbreaks happening approximately every three to six years. These outbreaks can last for a long time, sometimes over a year.