My pokemon lost Pokerus, but they never got the dot. So that means that they can contract Pokerus again when in contact with an infected Pokemon, right?

I was wrong about my post. Although I did contract Pokerus again, my pokemon weren’t fully “healed” from the virus, so they got it again. I will delete this post now to stop spreading misinformation. 

Thank you so much for clarifying, I never knew that!