1. Open your Whatsapp.
2. Click on Settings
3. Click on Account
4. You will see 'Share My Account'.
5. If you read underneath, you will see that all your information from Whatsapp is shared with Facebook
6. Quickly switch it off.
7. You have only 30 days to do this.

Unless you want your whatsapp to be shared on Facebook. Send this to all your friends...
For your safety and for your friends and families safety.