Cold exposure impairs extracellular vesicle swarm–mediated nasal antiviral immunity

(Journal of Allergy and Clinical Immunology) The human upper respiratory tract is the first site of contact for inhaled respiratory viruses and elaborates an array of innate immune responses. Seasonal variation in respiratory viral infections and the importance of ambient temperature in modulating immune responses to infections have been well recognized; however, the underlying biological mechanisms remain understudied.