800,000 doses of H1N1 vaccine shots for children have been recalled because tests indicate the doses lost some strength.
The shots were made by Sanofi Pasteur for children ages 6 months to 3 years. Doses were distributed across the country last month and most have already been used. According to the Centers for Disease Control and Prevention, the recalled doses are safe and effective, but may have reduced potency.
Read more at msnbc.com,
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