[beervirus]

Sunlight doesn't contain any 222 nm light. That's why there's no selection pressure for a virus to be able to survive irradiation at 222 nm.

[zamfi]

This is the probably the right answer. See e.g., this link https://commons.wikimedia.org/wiki/File:Solar_spectrum_en.sv... for what wavelengths of sunlight reach the earth’s surface.