His clients welcome the initiative with extra tips.
With Russia on Covid-19 lockdown, 77 houses were burned down in Novosibirsk and Kemerovo regions.
Abnormally hot May weather resembles midsummer with air temperatures as high as +35C.
Alexander Chepurnov had already recovered once when he re-infected himself in an experiment.
Worrying videos and pictures show how the pristine polar region of northern Yakutia is ablaze.