I don't think most people in the group think they are being dragged down. Besides, if they leave the girl, who else will they leave? Maybe T-Dog starts viewing himself as expendable (and not worthy of a search) and does something rash. Maybe Carol gets distraught and does something rash. Who knows? I think there is no other choice but to put in a very strong effort to find the girl.
On a lot of the message boards people are complaining about "they should get going" and "what are they waiting around for?"
If you look at them, this is the first time in months they have had a safe place to hold up. Where do people want them to go? Fort Benning? What if there's nothing there? What if it's worse? If the military isn't holding the CDC, which is the last line of defense for a viral outbreak, what makes everyone think that this farm isn't the best thing they may find, perhaps ever?
So search for the kid forever, it's not like they are going to miss Monday Night Football or anything else for that matter.
Fixed.