Sweating cools us down in two ways. Firstly sweat is wet so it cools down your body. Secondly, it evaporates which takes away some of our body heat. We sweat when we're hot and it helps to bring our internal temperature levels lower when it gets too high on a hot day, therefore assisting in thermoregulation.
The enveloped virus make the cell think that they just found a jackpot of protein, only to find a virus inside to take over the system, like the trojan horse.
It would be convection because it isnt having any physical collision which rules out conduction and it is going through mid air which rules out evaporation and radiation