the old onion trick., page-4

Yes they have sulphur based compounds, hence why you cry when you cut them.

But how do they physically clear a room and a person of harmful bacteria and viruses?

Do they breathe, cycling the air of the room?

How do onions get to the billions of bacteria/viruses within a persons cells casing them to be sick?

If they are this powerful then surely a few cut onions placed around a house will render it bacteria free. Is the entire cleaning produce industry a scam?