Each of the three leading H1N1 vaccine manufacturers reveal various levels of uncertainty regarding the safety of their product for pregnant or nursing mothers or for children under 4 years of age.
These details are easily accessed on the FDA website in the form of individual reports filed by the three companies. The next three posts below this one excerpt the text from the reports for your convenience and link you to the full documentation on the FDA website.
Keep in mind that before production began, the comapanies lobbied for and recieved legal immunity from lawsuits involving potential adverse effects of their products.
for more on that see previous post from August:
http://swinefluvaccinesafetyquestions.blogspot.com/2009/08/legal-immunity-set-for-swine-flu.html
