But its still research, and she'll be the one to find whats different. Also she's not a lab rat in the sense that others are not 'doing stuff' to her. I'll stand firmly on my opinion that there is no drug cocktail that prevented them from getting infected. Saul would have changed even if he was a slow turner before he received the drugs. Tanya also said that with the slow turner they had, the one that bit her, they tried everything and nothing worked...meaning the drugs had no effect.