Update

Reported by: NP Klein, MD, PhD, Kaiser Permanente Vaccine Study Center, Oakland, California, and Vaccine Safety Datalink Rapid Cycle Analysis Team. WK Yih, PhD, Dept of Ambulatory Care and Prevention, Harvard Medical School and Harvard Pilgrim Health Care, Boston, Massachusetts, and Vaccine Safety Datalink Rapid Cycle Analysis Team. M Marin, MD, AO Jumaan, PhD, JF Seward, MBBS, Div of Viral Diseases, National Center for Immunization and Respiratory Diseases; K Broder, MD, J Iskander, MD, Immunization Safety Office; DE Snider Jr, MD, Office of the Chief Science Officer, CDC.