Air conditioning
Warm air can contain more water vapor than cold air. When the air is cooled, the extra vapor has to be eliminated in order that relative humidity remained at the optimal level of 30-60%. That is, the amount of water vapor in the air should be 30-60% of the maximum possible amount at that given temperature. For a detailed description refer to: Managing Ideal Indoor Humidity for Maximum Comfort by Stewart Unsdorfer.
The extra water vapor is eliminated by condensation. This is the process when vapor is transformed to liquid at the dew point temperature. Here is a brief explanation of this process.
This video explains how air conditioning works and how condensation is applied during the process:
Here is a description exploring the technical details of air conditioning.
A brief summary of the condensation process of air conditioning:
Why (and how) your AC forms water
Your air conditioner actually has two jobs: to cool your home and to remove humidity.
Here's how it works:
Step 1: AC pulls in hot, humid air from your home. That warm air then passes over a very cold evaporator coil.
Step 2: Moisture from the hot air collects on the evaporator coils and eventually drips down into the drain pan.
Step 3: The water in the drain pan drains outside via the condensate drain line.
I suppose that the massive application of air conditioning with this condensation process necessarily involved is the reason of the extreme virus spread in Izrael and in the USA.
Air cooling is also essential in deep mining. Here is a short summary, and here is a very detailed description about this topic.
Coal mines had to be shut down due to massive virus spread in Poland and in the Czech Republic during the summer.
The reason may be the condensation taking place due to air conditioning in the mines.