Besides the obvious qualifiers such as being infected by the virus or losing a job due to the virus how else can one quality?

That way not only is there effectively more hot water, and no possibility of scald, but you've reduced the possibility of Legionella infection of the hot water. 

After that, he got some kind of infection (no proof) and he miss 4 days of work.

I can picture lots of people unwittingly uploading stuff that has been infected with something nasty, and then that just spreads ...

Tenant has become ill with a chest infection as a direct result.

Chemical warfare.Biological warfare, folks will go to an infected tree, beetles, worms, fungus and collect the stuff and plant it on the target.

Where I live, it's not a matter of if you'll get termites, it's just a matter of when.Personally, I spend $400 a year on termite treatments for my personal residence, but on my investment properties I don't pay for prevention, only treatment.My termite contractors generally charge about $700 to treat an infected house, so it's more cost effective to remediate a problem than try to prevent it, given the likelihood of a termite infestation in any given year.

Our units are also self-contained units, but we still had to test all communal areas and outside of the unit to make sure that the contamination did not infect any other areas. 

If he didn't even need stitches, there won't be a lawsuit (unless it becomes infected and he loses his hand).

It is a repellant that kills on contact but does not infect the reast of the nest.