Pregnant women should have concessions made for them for the welfare of the baby, not for them personally. When you're talking about a pregnant woman, you're talking about two people, because if something adversely affects her, it adversely affects the child too.
The OP is a troll, quite clearly.
Everybody knows that under 5s, over 65s, and pregnant women have lower immune systems than ordinary people, and therefore should have priority when having vaccinations.
And besides, it's not like they're handing out the vaccine willy nilly to pregnant women if they haven't got the swine flu.