Grand Challenges Explorations Round 21 Opened

In the twenty-first round of Grand Challenges Explorations, proposals were solicited that target the following challenges:

• Innovations in Immunization Data Management, Use, and Improved Process Efficiency;
• Affordable, Accessible, and Appealing: The Next Generation of Nutrition;
• Tools and Technologies for Broad-Scale Disease Surveillance of Crop Plants in Low-Income Countries