Some of today or this week, facebook my friends often exposed to the virus are not clear from whom the sender or that include it.
Virus in the form of a link or pornographic images that appear on the wall of my friends and including me.
From there I found one application that can be used to protect our facebook.

MyPageKeeper is a facebook application that has a function to protect your facebook account from hackers and malicious attacks.
This application will monitor and perform your facebook profile filtering of spam mails and various kinds of phishing. Automatically every post sent to your facebook profile will have been verified.

Here... How to use MyPageKeeper application :

1. Log into your Facebook account
2. Go to page MyPageKeeper
[https://www.facebook.com/apps/application.php?id=167087893342260&sk=info]
3. Click on the button Go to App
4. Click on the Add button to MyPageKeeper, click Allow

MyPageKeeper application will continually monitor and supervise the facebook profile kits from various threats of hacking and other Internet crimes. Good luck :)