No, but it is a sense we use constantly: people instinctively avoid unpleasant odors. It's one of our most basic environment assessment tools and it's always active: we smell things to assess all sorts of properties, but chiefly "is this toxic/a biohazard" is pretty well coded into us.

Forcing someone to consciously suppress that impression upfront is fighting against some pretty basic "am I safe?" instincts.