Do I have a visus

Unless you have jailbroken your iPad, no iPad can get virus or malware.

If apps freeze or things are running slow, I'd go to Settings > iPad Storage and see how much free space you have left on the iPad. If you are running out of memory, that could certainly make things run slow. And if you are, you should delete unneeded apps, photos, music, texts email from the device.

Also, double tap your home button to bring up the app switcher. If you have apps running in the background using memory, it can slow things down.

Finally, check how many pages you have running in Safari and close any page you don't need.

If the suggestions provided by rbrylawski don't help, you can try doing a restore by connect it to your computer and then using iTunes on the computer restore the iPad.