In many cases, yes, it's like common heart disease--for example, you do the mental equivalent of too much eating and not enough exercise, and yeah, you're going to have bad mental health. 

Seriously though, if there are rats in one unit, they are probably going to be in the other unit eventually.They like to eat cereal and will gnaw a holes in the cereal boxes.Sometimes the renters bring them inside with their move in belongings, from their old place, or they leave a door propped open during move in and an outdoor rat scampers in.They also will use the roof gutters like Habitrails.If you buy the place, you will have to get them out, they carry diseases like typhoid.You cannot allow them in your rentals.Good Luck!

There are a LOT of windows, and all of them leak like crazy, because this house was built by rich people, it was built to be heated by coal in western PA at a time when poor ventilation was thought to cause many major diseases, and anthracite was cheaper in western PA than anywhere else in the world.

They’ve removed over grown diseased rose bushes and planted new.

At the height of covid heart disease was still the #1 killer in US, was before, still is today.

This seems to solve the symptom but not the disease which is the disrespect.

This research will not only be focused on actual health solutions but on building a body of knowledge of the finer workings of the body's various detoxification/excretion pathways and mechanisms for substances of all kinds, to bring scientific attention to the most reliable methods of healing and staying disease free.

This could be an "accident, disease etc" over which we have no control, but it should give "peace of mind".

Many years ago when AIDS was considered a fatal disease gay individuals put property in Irrevocable Trusts to ensure that their lover (who at that time could not be a legal spouse) would get their property and that their estranged families would not try to take their assets. 

There is an outbreak of a contagious disease in the area that they live in.