Getting Rid of Parvo Virus in the Yard?

When will parvo be gone? Before my dog died of parvo, our grass was over 30cm long, after he died we cut the grass and it was dead. Is the virus still in my yard? It's been 3 months since he died and I want to know what can help get rid of parvo (other than bleach). Thanks:)

By ME:D from P.E