When is the most secure house not safe enough?

Investigations need to be carried out before people are moving into their new home.
When there are any chronic or severe illnesses in the house.
Even sleepless nights can indicate problems!

In a few years testing houses for safe living and sleeping places could be as necessary as the washing of hands by doctors between seeing patients in a hospital.[1]

1. For more information about what I mean, please read up on what happened to Prof. Dr. Ignaz_Semmelweis in 1847