Document Detail

A phase 3 trial of RTS,S/AS01 malaria vaccine in African infants.
MedLine Citation:
PMID:  23136909     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The candidate malaria vaccine RTS,S/AS01 reduced episodes of both clinical and severe malaria in children 5 to 17 months of age by approximately 50% in an ongoing phase 3 trial. We studied infants 6 to 12 weeks of age recruited for the same trial.
METHODS: We administered RTS,S/AS01 or a comparator vaccine to 6537 infants who were 6 to 12 weeks of age at the time of the first vaccination in conjunction with Expanded Program on Immunization (EPI) vaccines in a three-dose monthly schedule. Vaccine efficacy against the first or only episode of clinical malaria during the 12 months after vaccination, a coprimary end point, was analyzed with the use of Cox regression. Vaccine efficacy against all malaria episodes, vaccine efficacy against severe malaria, safety, and immunogenicity were also assessed.
RESULTS: The incidence of the first or only episode of clinical malaria in the intention-to-treat population during the 14 months after the first dose of vaccine was 0.31 per person-year in the RTS,S/AS01 group and 0.40 per person-year in the control group, for a vaccine efficacy of 30.1% (95% confidence interval [CI], 23.6 to 36.1). Vaccine efficacy in the per-protocol population was 31.3% (97.5% CI, 23.6 to 38.3). Vaccine efficacy against severe malaria was 26.0% (95% CI, -7.4 to 48.6) in the intention-to-treat population and 36.6% (95% CI, 4.6 to 57.7) in the per-protocol population. Serious adverse events occurred with a similar frequency in the two study groups. One month after administration of the third dose of RTS,S/AS01, 99.7% of children were positive for anti-circumsporozoite antibodies, with a geometric mean titer of 209 EU per milliliter (95% CI, 197 to 222).
CONCLUSIONS: The RTS,S/AS01 vaccine coadministered with EPI vaccines provided modest protection against both clinical and severe malaria in young infants. (Funded by GlaxoSmithKline Biologicals and the PATH Malaria Vaccine Initiative; RTS,S number, NCT00866619.).
; Selidji Todagbe Agnandji; Bertrand Lell; José Francisco Fernandes; Béatrice Peggy Abossolo; Barbara Gaelle Nfono Ondo Methogo; Anita Lumeka Kabwende; Ayola Akim Adegnika; Benjamin Mordmüller; Saadou Issifou; Peter Gottfried Kremsner; Jahit Sacarlal; Pedro Aide; Miguel Lanaspa; John J Aponte; Sonia Machevo; Sozinho Acacio; Helder Bulo; Betuel Sigauque; Eusébio Macete; Pedro Alonso; Salim Abdulla; Nahya Salim; Rose Minja; Maxmillian Mpina; Saumu Ahmed; Ali Mohammed Ali; Ali Takadir Mtoro; Ali Said Hamad; Paul Mutani; Marcel Tanner; Halidou Tinto; Umberto D'Alessandro; Hermann Sorgho; Innocent Valea; Biébo Bihoun; Issa Guiraud; Berenger Kaboré; Olivier Sombié; Robert Tinga Guiguemdé; Jean Bosco Ouédraogo; Mary J Hamel; Simon Kariuki; Martina Oneko; Chris Odero; Kephas Otieno; Norbert Awino; Meredith McMorrow; Vincent Muturi-Kioi; Kayla F Laserson; Laurence Slutsker; Walter Otieno; Lucas Otieno; Nekoye Otsyula; Stacey Gondi; Allan Otieno; Victorine Owira; Esther Oguk; George Odongo; Jon Ben Woods; Bernhards Ogutu; Patricia Njuguna; Roma Chilengi; Pauline Akoo; Christine Kerubo; Charity Maingi; Trudie Lang; Ally Olotu; Philip Bejon; Kevin Marsh; Gabriel Mwambingu; Seth Owusu-Agyei; Kwaku Poku Asante; Kingsley Osei-Kwakye; Owusu Boahen; David Dosoo; Isaac Asante; George Adjei; Evans Kwara; Daniel Chandramohan; Brian Greenwood; John Lusingu; Samwel Gesase; Anangisye Malabeja; Omari Abdul; Coline Mahende; Edwin Liheluka; Lincoln Malle; Martha Lemnge; Thor G Theander; Chris Drakeley; Daniel Ansong; Tsiri Agbenyega; Samuel Adjei; Harry Owusu Boateng; Theresa Rettig; John Bawa; Justice Sylverken; David Sambian; Anima Sarfo; Alex Agyekum; Francis Martinson; Irving Hoffman; Tisungane Mvalo; Portia Kamthunzi; Rutendo Nkomo; Tapiwa Tembo; Gerald Tegha; Mercy Tsidya; Jane Kilembe; Chimwemwe Chawinga; W Ripley Ballou; Joe Cohen; Yolanda Guerra; Erik Jongert; Didier Lapierre; Amanda Leach; Marc Lievens; Opokua Ofori-Anyinam; Aurélie Olivier; Johan Vekemans; Terrell Carter; David Kaslow; Didier Leboulleux; Christian Loucq; Afiya Radford; Barbara Savarese; David Schellenberg; Marla Sillman; Preeti Vansadia
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Publication Detail:
Type:  Clinical Trial, Phase III; Journal Article; Multicenter Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't     Date:  2012-11-09
Journal Detail:
Title:  The New England journal of medicine     Volume:  367     ISSN:  1533-4406     ISO Abbreviation:  N. Engl. J. Med.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-13     Completed Date:  2012-12-26     Revised Date:  2014-02-24    
Medline Journal Info:
Nlm Unique ID:  0255562     Medline TA:  N Engl J Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2284-95     Citation Subset:  AIM; IM    
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MeSH Terms
Immunization Schedule
Intention to Treat Analysis
Malaria Vaccines* / adverse effects,  immunology
Malaria, Falciparum / epidemiology,  prevention & control*
Plasmodium falciparum / immunology
Proportional Hazards Models
Treatment Outcome
Vaccines, Synthetic* / adverse effects,  immunology
Grant Support
092654//Wellcome Trust
Reg. No./Substance:
0/Malaria Vaccines; 0/RTS,S-AS01 vaccine; 0/Vaccines, Synthetic
Comment In:
N Engl J Med. 2012 Dec 13;367(24):2349-51   [PMID:  23136910 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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