Date Published: May 29, 2007
Publisher: Public Library of Science
Author(s): Hal Levin
Partial Text: This article and editor’s summary give the impression that the tuberculosis infection rate was actually reduced by opening windows . A careful reading of the article clearly states that while ventilation rates were measured, infection rates were merely calculated using the Wells-Riley equation. This is old news. While it is important to take into account the adequacy of the ventilation rate provided by mechanical ventilation systems, the ventilation rate through open windows is a function of window size, number, and location in a room as modified by indoor–outdoor temperature differences and wind direction and velocity.