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RTS,S+TRAP malaria vaccine shows promise for infant immunization.

Vaccine Weekly

| August 04, 2004 | COPYRIGHT 2004 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2004 AUG 4 - (NewsRx.com & NewsRx.net) -- An RTS,S+TRAP malaria vaccine, formulated in the AS02A adjuvant system, appears promising for immunization of infants.

According to a study from the United States, "Malaria vaccine RTS,S combined with thrombospondin-related anonymous protein (TRAP) and formulated with AS02A (RTS,S+TRAP/AS02A) is safe and immunogenic in adult humans and rhesus monkeys (Macaca mulatta). Here, RTS,S+TRAP/AS02A was administered on a 0-, 1-, and 3-month schedule to three cohorts of infant monkeys, along with adult comparators. Cohort I evaluated 1/5, 1/2, and full adult doses, with the first dose administration at one month of age; cohort 2 monkeys received full adult doses, with the first dose administration at 1 versus 3 months of age; and, cohort 3 compared infants gestated in mothers with or without previous RTS,S/AS02A immunization."

"Immunization site reactogenicity was mild," stated Douglas S. Walsh at the Eisenhower Army Medical Center in the U.S. and collaborators throughout the world. "Some infants, including the phosphate-buffered saline only recipient, developed transient iron-deficiency anemia, which is considered a result of repeated phlebotomies. All RTS,S+TRAP/AS02A regimens induced vigorous antibody responses that persisted through 12 weeks after the last vaccine dose. Modest lymphoproliferative and ELISPOT (interferon-gamma and ...

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Source: HighBeam Research, RTS,S+TRAP malaria vaccine shows promise for infant immunization.

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