Guess if you don't breath you will not inhale anything bad.
If you don't touch ANYTHING or let it touch you [and for heaven's sake not the air] you will not come in contact with germs.
If you don't open your mouth or swallow you will not ingest anything harmful.
Do I hear paranoia??
IMHO
Wishing all enough,
Dick Staeffler
PS I will not touch the piranha