Couple of scientific points to consider regarding masks. Though the viral particles are indeed much smaller than the pores in most masks, it's important to understand that viruses are spread via aerosols and not as individual viral particles. Aerosols are basically fogs of aqueous droplets that are much larger than an individual viral particle. The viral particles are carried within these droplets, possibly in huge numbers. Humans spread this and other viral disease mostly via aerosols produced as a result of coughing, sneezing, etc.. As these droplets have more mass than a viral particle they tend to drop onto the ground or nearby horizontal surfaces within a fairly short radius around the person emitting the aerosol. That's what the 6ft (2 Meter) spacing recommendation is based on. Of course there are exceptions, cases such as downwind from an infected, coughing patient on a gusty day I suppose. Also, note that a vapor is not the same as an aerosol (I've seen a lot of confusion on this point), in a vapor, liquid has completely changed its physical state from a liquid to a gas. A vapor cannot carry the viral particles.
Also there is concept of challenge. What microbiologists describe as a challenge is the minimum number of viral particles or bacteria cells required to cause an infection. Exposure to numbers of organisms below the challenge level will not generally result in establishing an infection. Of course this challenge level will differ for differing organisms, route of administration and individual people, but these challenge numbers tend to be in the exponential range, i.e. you can get infected by exposure to a single or a few organisms.
As a Career Scientist with two a major medical device companies, I love experiments - i.e. generating my own evidence where possible. If you want to do your own experiment to see for yourself and make up your own mind, take a spray bottle like you might use to mist plants. Hold up a piece of barrier material (cloth or mask) so that you can see both sides of it. Now spray one side and observe how much of the aerosol goes through the barrier material. You can even compare different materials to see which is a better aerosol barrier. Another experiment is to just spray the aerosol horizontally into the air and observe how far it travels.