03-09-2020
11:33 AM
8 Loves
As a physician, it seems to be not well understood that HEPA air filters, as used in plane air systems, are only able to effectively filter out particles larger than 300 nm (0.3 microns). The HEPA virus particle is between 70 and 120 nm in size (0.07-.12 microns), and therefore would not be fully filtered by a HEPA filter. That said, the transmission of Corona virus is mostly by droplet exposure from someone coughing or sneezing within six feet of your location, or by touching a contaminated surface and then touching your nose, mouth or eyes. Such droplets would be fully filtered by a plane's air handling system. Also, only about 20% of cabin air is recirculated - the rest is brought in fresh from outside the plane and discharged out of the plane at a fairly rapid rate. Thus, the chances of Corona virus infection from recirculated air is still exceedingly low.
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The new non-interactive route map is almost useless. It does not show nonstop routes, which was my major use for this in the past. Please have your IT department restore the former interactive route map ASAP.
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