I have checked out this cash contagion app (https://cashcontagion-thedivisiongame.ubi.com/gb/en/)

and found an interesting thing.

Iv tested 2 banknotes:

£50 and £5 both of them got 16000+ bacteria.

£50 are not so common in use at least not as many as £5.

What your thoughts about this app, how plausible they could be?