Yes, and we're so worried the Muslims could have obtained smallpox from the Russians but it's just as or more likely they obtained it from us, either bribing someone or by gaining employment at the labs that store it because we've been extremely lax.
Vaccinations should be given now to those who choose them, and if most of us are vaccinated, those who cannot be ---like the chemo patients or AIDS patients and others, would still be safer because the spread of smallpox would be extremely curtailed.
The plans I have seen to deploy vaccine to abort an attack are well thought out and should not be compromised by vaccination on demand.
I think how effective we are being in producing new doses, or acquiring supply elsewhere, is (should be) a military secret, and I will not speculate on it.
If, after we have a supply to immunize the population (never-vaccinated first), we don't do so because of FDA regs or liability issues, no one will be more critical than I. For now, I think the people with the responsibility are behaving quite-responsibly.