I'm not worried about me, just my son.
Hey, I've got a 14 year-old daughter, and I'm not unconcerned. But this also makes it less likely that we would transmit smallpox to our kids if we're exposed. If there's an outbreak in my area, she won't leave the house until the CDC has vaccinations on the ground, which will probably be within 48 hours of a confirmed case. That's what the 75 million doses will be held in reserve for, to target infected communities. They plan to come in like a SWAT team with the vaccinations.
This isn't perfect news, but it's very good news.
You are absolutely right! The only defense against smallpox, other than vaccination, is isolation. Think: Quarantine.
But, remember, you have to isolate EVERYONE in your household until the vaccinations are made available. The previously vaccinated members of the family could still bring the virus home on their clothing, etc. and infect your daughter. No work, no visitors, no mail, no new supplies (food, water). Nothing comes in from outside the home. No contact with the outside world whatsoever.
It would only be for a few days at most and the only sure way to keep your daughter safe.
I'm a nurse, with an unvaccinated son, and this is exactly what I intend to do if a smallpox outbreak occurs in my area.