Upon completion of this activity, participants will be able to:

Beverly Merritt, Technical Writer-Editor, Emerging Infectious Diseases. Disclosure: Beverly Merritt has disclosed no relevant financial relationships.

Désirée Lie, MD, MSEd, Clinical Professor, Family Medicine, University of California, Orange; Director, Division of Faculty Development, UCI Medical Center, Orange, California. Disclosure: Désirée Lie, MD, MSEd, has disclosed no relevant financial relationships.

Disclosure: Simon Cauchemez, PhD; Dominic E. Dwyer, BSc(Med), MBBS, FRACP, FRCPA, MD; Holly Seale, BSc, PhD; Pamela Cheung, RN; Gary Browne, MBBS; James Wood, BSc, PhD; and Zhanhai Gao, BSc, MSc, PhD, have disclosed no relevant financial relationships. C. Raina MacIntyre, MBBS, FRACP, FAFPHM, M App Epid, PhD, has disclosed that she has received grants for clinical research from 3M. Michael Fasher, MBBS, PhD, has disclosed that he has received grants for educational activities from and has served as an advisor or consultant to GlaxoSmithKline. Robert Booy, MBBS, FRACP, FRCPCH, MSc, MD, has disclosed that he has received grants for clinical research and educational activities from, and has served as an advisor or consultant to, CSL, Roche, Sanofi, GlaxoSmithKline, and Wyeth. All funding received is directed to a research account at The Children’s Hospital at Westmead, Sydney, Australia, and is not personally accepted by Dr. Booy. Neil Ferguson, FmedSci, DPhi, has disclosed that he has served as an advisor or consultant to Crucell Inc.

To obtain credit, you should first read the journal article. After reading the article, you should be able to answer the following, related, multiple-choice questions. To complete the questions and earn continuing medical education (CME) credit, please go to http://www.medscape.com/cme/eid. Credit cannot be obtained for tests completed on paper, although you may use the worksheet below to keep a record of your answers. You must be a registered user on Medscape.com. If you are not registered on Medscape.com, please click on the New Users: Free Registration link on the left hand side of the website to register. Only one answer is correct for each question. Once you successfully answer all post-test questions you will be able to view and/or print your certificate. For questions regarding the content of this activity, contact the accredited provider, CME@medscape.net. For technical assistance, contact CME@webmd.net. American Medical Association’s Physician’s Recognition Award (AMA PRA) credits are accepted in the US as evidence of participation in CME activities. For further information on this award, please refer to http://www.ama-assn.org/ama/pub/category/2922.html. The AMA has determined that physicians not licensed in the US who participate in this CME activity are eligible for AMA PRA Category 1 Credits™. Through agreements that the AMA has made with agencies in some countries, AMA PRA credit is acceptable as evidence of participation in CME activities. If you are not licensed in the US and want to obtain an AMA PRA CME credit, please complete the questions online, print the certificate and present it to your national medical association.