Grandma’s moistening kettle may have held off flu
By RANDOLPH E. SCHMID, AP Science Writer
Grandma may have been right about keeping a teakettle warming on the stove in winter to moisten the air. Studies of seasonal influenza have long found indications that flu spreads better in dry air. Now, new research being published Tuesday in Proceedings of the National Academy of Science, indicates that the key is the absolute humidity — which measures the amount of water present in the air, regardless of temperature — not the more commonly reported relative humidity.
Relative humidity varies depending on air temperature; absolute humidity doesn’t.
“The correlations were surprisingly strong. When absolute humidity is low, influenza virus survival is prolonged and transmission rates go up,” said Jeffrey Shaman, an Oregon State University atmospheric scientist who specializes in ties between climate and disease transmission Read more…
February 11th, 2009 by Admin | No Comments »