you must be gutted about the name change VIRUS was definately a cool name;
It reminds me of in my old graffiti days having to change my name from zeus when i saw a wholecar peice go past.
Contaygen is a good name, but what about 'chemical warfare' or retrovirus; i think botchalism has already benn done but im sure there are many other cool virus's you could use as a name! Good luck with it