FILE - In this Thursday, Oct. 29, 2009 file photo, Nicole Andreacchio, 

FILE - In this Thursday, Oct. 29, 2009 file photo, Nicole Andreacchio, second right, who is seven months pregnant waits in line to receive the swine flu vaccine from the Montgomery County Health Department at Congregation Beth Or in Maple Glen, Pa. A large study released by the New England Journal of Medicine on Wednesday, Jan. 16, 2013 offers reassuring news for pregnant women worried about getting a flu shot. The research found no evidence that the vaccine increases the risk of losing a fetus, and may prevent some fetal deaths. (AP Photo/Matt Rourke)
Associated Press
FILE - In this Thursday, Oct. 29, 2009 file photo, Nicole Andreacchio, second right, who is seven months pregnant waits in line to receive the swine flu vaccine from the Montgomery County Health Department at Congregation Beth Or in Maple Glen, Pa. A large study released by the New England Journal of Medicine on Wednesday, Jan. 16, 2013 offers reassuring news for pregnant women worried about getting a flu shot. The research found no evidence that the vaccine increases the risk of losing a fetus, and may prevent some fetal deaths. (AP Photo/Matt Rourke)
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