another treatment which may be effective against viruses including Corona, is Lie-Sol

Lie-Sol can help in the prevention and also in early/mildly symptomatic infections and in recovery.

Ultraviolet light has antiseptic properties, and lying in the sun can reduce stress and hence help the immune system and general health.
Not to be overdone, as sunburn should be avoided - and if prevention is the aim lying about shouldn't be practiced to the extent of interfering with physical exercise.