No, the only people who were erased, were the people in the timelines where that timeline's version of Booker accepted baptism and became Comstock.I thought when she killed Booker everybody was erased, cuz at the end he gets up and opens the door and then it just ends...
What we see after the credits is a Booker in a timeline where he still has Anna, but now there will never exist a Comstock to reach across time-space and take his daughter.
Anna/Elizabeth will grow up with daddy Booker. And judging by the way Booker seems surprised, I like to think some ripple across space-time is still rattling around inside his head, subconsciously motivating him to be a better dad. But that last bit is just how I like to see it.