My sister had to have an emergency C-section at 34 weeks due to a flu she contracted which basically dropped her blood pressure to zero. Thankfully the baby was a big one at 6lb 6oz!! She (the baby) did loose a little weight and there were some early issues latching on, but mainly it was because she was just so sleepy it was hard to wake her up to feed. She did get a little jaundice but it went away after 48 hours. My poor sister was quarantined for the first 48 hours due to not knowing what flu she had at the time (they suspected swine flu but turned out no). In total the baby was in for just one week then was able to go home, with no further issues.
I think to be honest it would depend on the baby's weight, as she was quite heavy for this far along I believe, so that made a big difference to how she coped out of the womb