Must identify if it is bacteria or virus first.
For virus, you need to tahan the muscle sores and what not and must
drink lots of water. No cure basically, you'll need to rely on your
own immune system to fight the virus.
For bacteria(infection), you need to see doctor to get some
anti-biotics.
I recently had a virus and also vommited 6 times. And just
yesterday i had some mild fevers again.(in case you are wondering
why i am in sgforums the whole of today) I drank 2500ml of water.
Now im fine. 
For virus, the more distinct symtoms are generally high fever,
muscle sore, glands swell up.