In the context of the general self-isolation regime associated with the COVID-19 pandemic, loneliness is becoming one of the most global, universal human problems. The coronavirus exacerbated a previously imperceptible situation of loneliness in the world and turned people into the participants in the largest psychological experiment on the planet. In this regard, it is relevant to describe loneliness as a social phenomenon included in the stratum aspect (among diff erent population groups), as well as in the context of cross-country analysis.