> > > 6. That colds are caused by a virus (rather than by dry air)
> > >
> >
> > What do you mean here? That has not much to do with Japan...
> >
>
> I guess it does. Hence all the humidifiers.
>
>
OK, I got it. Using an old fashioned kerosene heater with a big water kettle
on it, will do the trick... and you have always hot water for tea and coffee
at hand, and a warm room. The only setback is that most of these heaters
don't have an exhaust pipe to the outside.