Too bad we can't superimpose a map of where all the illegal border crossers are being shipped..... but probably the biggest factor is weather. MOST of those areas are where it is getting colder, and sadly, very little attention has been paid to indoor air quality, which numerous peer-reviewed studies has said that better air movement/ventilation is much more effective than face diapers. (including N 95s)
Too bad we can't superimpose a map of where all the illegal border crossers are being shipped..... but probably the biggest factor is weather. MOST of those areas are where it is getting colder, and sadly, very little attention has been paid to indoor air quality, which numerous peer-reviewed studies has said that better air movement/ventilation is much more effective than face diapers. (including N 95s)