Thais are avid nose pickers so not good 

 

https://www.sciencealert.com/mouse-study-suggests-nose-picking-has-a-surprising-link-with-alzheimers#
 

https://www.dailyrecord.co.uk/news/health/doctor-claims-picking-your-nose-36468804.amp
 

dont don’t do it

What about chewing your fingernails.  In the last 10 minutes I've scratched my nuts, pet the dog and picked my nose.  No way in helll my fingers are ever going in my mouth.

There are numerous caveats here, not the least of which is that the supporting research so far is in mice rather than humans, but the findings are definitely worth further investigation – and could improve our understanding of how Alzheimer's disease starts, which remains something of a mystery.

I hadn't realised a mouse could pick its nose!