WhatsApp recently introduce the blue tick button to notify that your message has been read or not but unfortunately this one reamin unpopulat between its users. Do you want to make disable this feature? don't worry i 'll tell you how you can do this.
This is just an optional feature you just can disable it by going setting-> Privacy and read reception option.
Those who download WhatsApp newer version can disable it directly from read reception option but this is only available for android users.This feature is like last seen option but this one can be disable easily.
but if someone off this feature not the sender neither the receiver gonna see this option means one side action can effect both the parties.
You can download the latest version of WhatsApp from
Here