Good point tzippi. Because the nasal vaccines contain live, albeit weakened, virus, they are contraindicated for anyone with a compromised immune system.
Oomis’s point that pregnant women need to be vigilant about what medicines/ vaccines they take is a good one. Many pregnant women have safely taken the seasonal flu vaccine safely, so there is no reason for a pregnant woman to be more concerned than anyone else about taking the vaccine. And since the H1N1 vaccine is not materially different, except for the strains included, it is also safe for pregnant women.
Epidimiologists have noted that pregnant women are particularly vulnerable to H1N1, and are infected at greater rates than the general population. In addition, pregnant women are more likely than others to become very sick or die from the H1N1 virus.