Below is readable file from the American Thoracic Society. It applies to everyone who breathes air in 2021. I recommend we watch the wind gusts and wind currents across our planet. This is easy to keep track of at the website of windy.com At this site you can see particulates that are in wind and air and literally see the direction of the wind currents of the world and your very own location. I hope you will get use to using this windy.com site and be able to prepare for the worst yet pray for the best of circumstances. Sadly, not many people are aware of elements we breath but cannot see nor smell.