In New York: "Increased rates of culture-negative pneumonia and influenza were associated with increased PM2.5 concentrations during the previous week." Based on study of 498,118 adult New York State residents. Air pollution is still a serious problem.https://www.researchgate.net/publication/328774341_The_Association_between_Respiratory_Infection_and_Air_Pollution_in_the_Setting_of_Air_Quality_Policy_and_Economic_Change …
