Everyone’s making a pretty big stink out of hand washing these days. I mean, sure social distancing, but come on… handwashing and Covid-19?
Well, basically, if you consider how many things you touch in a day. From door handles to bathroom faucet knobs, toilet handles and lids to counter tops, car keys, and even cell phones.
That’s a LOT of touching. When you add to that list the number of things that everyone else has man-handled (or a woman, if you are one), the ‘touches’ add up to an intense amount of germ spreading possibilities.
Yesterday (March 29th, 2020) the World Health Organization published a description of the particle sizes of the most likely transmission routes of the Novel Coronavirus, also known as Covid-19. They defined particle sizes in the respiratory mode of transmission as “droplet transmission” and “airborne transmission”, differing only in the sizes of the particles(1).
In this case, size matters! For the purpose of this discussion, we’re going to be talking about micrometers. A micrometer (μm) is one thousandth of a millimeter (0.001 mm), or one millionth of a meter (1 x 10-6 m) (2).