Cholera is not an issue in the 'civilised' world anymore as only those in developing countries suffer and die from it; it may not matter to many here but it is a massive problem with enormous economic and personal costs to the populations affected:
Cholera is an acute diarrhoeal disease that can kill within hours if left untreated. Researchers have estimated that each year there are 1.3 million to 4.0 million cases of cholera, and 21 000 to 143 000 deaths worldwide due to cholera
Smallpox - eradicated by vaccinating people
AIDS - very effectively bridled by a combination of medication and prevention; rumours of curative treatment and life expectancy of sufferers now very close to non-infected people.
As I said in an earlier post - these things may all matter very little to most 'over here' but they are big issues for those affected and their societies.
It depends on your own reference framework.
I personally think there are no problems in the construction industry - you may have a different opinion
Let's hope this pandemic is quickly under control so that only sad gits working in the health service have to worry their little heads about medical suffering.