Forum:Doom Virus Dragon's Effect

I just wanted help with these two rulings: I special summon Doom Virus Dragon to the field and activate it's effect destroying all my opponents monsters in hand, they control no monsters on field but two in the hand are gone.

The next turn after the draw they special summon a monster from the extra deck with more than 1500 atk using monsters with lower attack, would that monster be destroyed by Doom Virus Dragon immediately or at the draw phase next turn?

Also is the destruction effect of Doom Virus a lingering effect available even should it be destroyed.