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The immunogenicity and safety of OkavaxTM varicella vaccine, when administered concomitantly with TrimovaxTM measles, mumps, and rubella (MMR) vaccine, were assessed in 300 Filipino children 1224 months old. Three groups received Okavax only, Trimovax only, or both vaccines concomitantly. In sera obtained six weeks after vaccination, high varicella antibody geometric mean titers (GMTs) (115 and 79.8 mIU/mL, respectively) and seroconversion rates (
91.9%) were similar for Okavax given alone or concomitantly with Trimovax. High MMR GMTs and seroconversion rates (mumps
94.6%, measles and rubella
98.6%) were not affected by concomitant administration of Trimovax with Okavax. Solicited local and systemic reactions recorded by parents were slightly more numerous after concomitant administration, but the majority of all reactions were mild and transient. The good tolerance and high immunogenicity observed supports the concomitant administration of Okavax and Trimovax to children in their second year of life to protect against four life-threatening diseases while simplifying childhood immunization programs.
Received October 14, 2002. Accepted for publication October 12, 2003.
Acknowledgments: We are grateful to V. Canouet, Professor M. Crisostomo, C. Deroche, I. Durot, and R. Mate for their expertise in the performance of this study.
Financial support: This study was supported by Aventis Pasteur (Lyon, France).
Disclaimer: Didier Leboulleux and Eric Desauziers are employees of Aventis Pasteur.
Authors addresses: Salvacion Gatchalian, Charissa Tabora, and Nancy Bermal, Research Institute for Tropical Medicine, Filinvest Corporate City, Alabang, Muntilupa, The Philippines. Didier Leboulleux, Aventis Pasteur, 24/F, DCH Commercial Centre, 25 Westlands Road, Quarry Bay, Hong Kong, Telephone: 852-2506-8421. Eric Desauziers, Aventis Pasteur, 2 Avenue Pont Pasteur, 69007 Lyon, France, Telephone: 33-4-37-37-73-84.
Reprint requests: Salvacion Gatchalian, Research Institute for Tropical Medicine, Filinvest Corporate City, Alabang, Muntilupa, The Philippines, Telephone: 63-2-809-7599, Fax: 63-2-842-2245, E-mail: edsal{at}impactnet.com.
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