By Miriam Raftery

December 15, 2009 (San Diego) – The Centers for Disease Control and Prevention (CDC) have issued a voluntary recall of 800,000 doses of H1N1 flu vaccine in pre-filled syringes for children ages 6 to 36 months. Testing by manufacturer Sanofi Pasteur found reduced potency in four lots distributed nationwide, including 3,100 doses distributed in San Diego County.