I do not know if you have heard but it seems that from 8 February whatsapp will change its privacy policy for users outside Europe by crossing whatsapp data with those of facebook perhaps for better advertising profiling, may it be of interest to users? yes why? if you are on a working whatsapp group, other users will be able to go back to your facebook profile
I will delete it immediately just in case. I wondered why 2 friends stop sending me massages there and told me not to send them anything in Whatsapp. After this comment will read a little more about it to check what is the situation.