From Joseph Mercola, DO
The healing properties of fresh air have been appreciated since ancient times, when Pliny the Elder (AD 23-79) recommended that people with tuberculosis breathe in the air of evergreen forests, which happens to be high in ozone, a known germicidal agent.
In more recent history, outdoor air was considered part of the standard treatment for tuberculosis and other infectious diseases. Ironically, the “high-tech” hospitals of modern day, with their enclosed, indoor close quarters, may be facilitating the spread of disease far more so than open-air hospitals of yesteryear.
During the 1960s, scientists working on biodefense research coined the term “open air factor,” or OAF, to describe the germicidal component of outdoor air that was capable of killing pathogens and reducing their infectivity. Interest in the use of open air to promote health and reduce infectious disease fell away by the 1970s, however, and has remained largely ignored since.
In a review article published in Cureus, infectious disease expert Peter Collignon with the Australian National University is calling for urgent further investigation into the open air factor, particularly as it relates to COVID-19, stating, “[W]e need to act without delay, as there is already sufficient evidence to show that public health generally would improve if more emphasis was placed on increased exposure to outdoor air.”