While I was involved in hospital infection prevention programs, I often made the argument that all respiratory diseases have both a droplet and airborne component. My rationale was that some of the droplets expelled could easily be small enough to dedicate in the air and leave virus particles suspended in the air, especially in spaces that are naturally dry or through environmental controls.
Expert commentary providing support for this position was provided on the CIDRAP site.
Most importantly though, please don’t purchase either type. These are really going to be desperately needed in healthcare when things really take off mid month.