I’m laughing but I was seriously thinking about the feasibility of a travelling sauna bag to use on a plane - lets you shroud yourself in a hot moist virus-unfriendly microclimate AND gives off bonus “I’m a freak, stay away from me” energy, which is also highly effective.

Must have read “Silvie and Bruno” at a peculiarly impressionable age because that plunge bath idea is never too far from my thoughts.