A study from Oregon State University suggests that lower levels of water in cold winter air tied to more influenza.
“…new research suggests that low humidity and unusually dry skies might be responsible for increases in influenza, such as those that occur during winter months.
“This dry period is not a requirement for triggering an influenza outbreak, but it was present in 55 to 60 percent of the outbreaks [the study] analyzed…”
The Yoga Librarian 