With the advent of autumn and winter, respiratory diseases such as influenza and pneumonia have entered a high incidence period, especially for the elderly. Why are the elderly prone to respiratory diseases in autumn and winter? Song Yuanlin, director of the Department of Respiratory and Critical Care Medicine of Sun Yat sen Hospital affiliated to Fudan University, said that as the temperature drops, the flu gradually becomes more frequent, and patients exposed to the flu may be infected and become ill, thus suffering from upper respiratory tract infection.
