M. tuberculosis in aerosol is classified by WHO as a Risk Group organism, requiring biosafety level 3 laboratory safety precautions.
气溶胶中的结核分枝杆菌被世卫组织归类为危险生物群，需要采取3级生物安全实验室安全措施。
2
It was found that even on the mountain higher than 3000 m above sea level water vapor and aerosol are still the main factors of the atmospheric extinction.
指出，即使在三千米以上的高山大气中，水汽和气溶胶仍然是主要的消光因子。
3
Coughing was induced by challenging pigs with an aerosol of 0.8 m citric acid over 15 min. Coughs were counted by a trained observer for 30 min.