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Grand Challenges is a family of initiatives fostering innovation to solve key global health and development problems. Each initiative is an experiment in the use of challenges to focus innovation on making an impact. Individual challenges address some of the same problems, but from differing perspectives.

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Challenges: Single-Dose Vaccines
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A Live Recombinant Attenuated Salmonella Anti-Pneumococcal Vaccine for Newborns

Roy Curtiss, Arizona State University (Tempe, Arizona, United States)
Jul 1, 2005

The current vaccine against bacterial pneumonia (pneumococcus) requires a regimen of four injections given at specific intervals. In developing countries, this not only complicates the vaccination process for health workers and children, but it also is a serious obstacle for families who must travel long distances to the nearest health clinic. Dr. Curtiss and his colleagues are working to develop new vaccines against bacterial pneumonia that require only a single dose, can be delivered orally, and are safe for newborns, infants, and people who are malnourished or whose immune systems are compromised.

Linking Innate and Specific Immunity to Develop Single Dose Vaccines for Neonates

Lorne Babiuk, University of Saskatchewan (Saskatoon, Saskatchewan, Canada)
Jul 1, 2005

Vaccinating infants against infectious disease is complicated by newborns' immature immune systems, the tendency of their immune systems to mount Th2-biased responses, and interference from maternal antibodies. Dr. Babiuk's team is working to develop new formulations of vaccines that can induce a long-lasting, balanced immune response in infants after a single­-administration vaccination.

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View the Grand Challenges partnership network

The Bill & Melinda Gates Foundation is part of the Grand Challenges partnership network. Visit www.grandchallenges.org to view the map of awarded grants across this network and grant opportunities from partners.