Effect of dormitories’ ventilation rates on spread of common cold

Investigates the relationship between the infection rate of the common cold and the ventilation rate and crowdedness in their dormitories. In the phase I of the study, investigates the health of the students and the environment of the dormitories mainly by questionnaire. In the phase II, measures indoor temperature, relative humidity and CO2 volume concentrations in both summer and winter, and then calculates dormitory ventilation. The results show that the infection rate of the students in six-person dorm rooms is twice as high as that of the students in three-person rooms. There is a dose-response relationship between ventilation rates in dormitories and the infection rate of the common cold. Crowded dormitories and low ventilation rates are associated with respiratory infections among college students.