Not OP, but here is an article that says the size-based definition of droplet vs. aerosol remains a bit vague (the article is about influenza A virus, but I believe the statement on vector size remains relevant):

"There is essential agreement that particles with an aerodynamic diameter of 5 µm or less are aerosols, whereas particles >20 µm would be large droplets. Some authors define aerosols as ≤10 µm or even ≤20 µm (Knight 1973; Treanor 2005); particles between 5 and 15 to 20 µm have also been termed ‘intermediate’ (Couch et al. 1966; all values refer to the aerodynamic diameter; for bioaerosols, they refer to the aerodynamic diameter after evaporation). When reviewing the literature, it is therefore important to verify the size of the particles being studied and the authors' definitions."

https://royalsocietypublishing.org/doi/full/10.1098/rsif.200...

Droplet size is not generally determined by the disease. Droplet size distribution and air suspension parameters depend on humidity and temperature, as well as composition, salinity, etc.