It is a big green ball with spikes that can split you or can be eaten by you.
So during the game if you want to choose to run then it is gonna be problem when getting bigger.If you dont want get away it then you have try to eat first virus for one time .That will make you 16 balls.For this you have to be big mass than viruse.Another thing,if you shoot it for 7 times by press W then you can use viruses for attacking other people balls.
If you have better explanation then try.
