A respiratory society and other institutions in Japan have jointly announced measures to prevent the spread of mycoplasma pneumonia, which is on the rise in the country. Mycoplasma pneumonia is a respiratory disease caused by bacteria. Children are more susceptible to infection than adults. Symptoms include a fever and a persistent cough. Cases of mycoplasma pneumonia began to rise this summer in Japan. Data from the National Institute of Infectious Diseases show that the weekly average number of cases reported by about 500 medical institutions nationwide hit a new high on October 13. It was the third straight weekly high since a new method of data collection was instituted.