The Bill & Melinda Gates Foundation is now accepting grant proposals for Round 7 of Grand Challenges Explorations, an initiative to encourage innovative and unconventional global health solutions. Applicants can be at any experience level; in any discipline; and from any organization, including colleges and universities, government laboratories, research institutions, non-profit organizations and for profit companies. Grant proposals are being accepted online until May 19, 2011 on the following topics: * Explore Nutrition for Healthy Growth of Infants and Children * Apply Synthetic Biology to Global Health Challenges * The Poliovirus Endgame: Create Innovative Ways to Accelerate, Sustain, and Monitor Eradication * Create the Next Generation of Sanitation Technologies * Design New Approaches to Cure HIV Infection * Create Low-Cost Cell Phone-Based Solutions for Improved Uptake and Coverage of Childhood Vaccinations Initial grants will be US $100,000 each, and projects showing promise will have the opportunity to receive additional funding of up to US $1 million. Full descriptions of the new topics and application instructions are available at: www.grandchallenges.org/gce/ We are looking forward to receiving innovative ideas from around the world and from all disciplines. If you have a great idea, apply. If you know someone else who may have a great idea, please forward this message. Thank you for your commitment to solving the world's greatest health challenges.