Raja Rao, senior program officer on the Vaccine Delivery team at the Bill & Melinda Gates Foundation, writes in the foundation’s “Impatient Optimists” blog, “Before my career in vaccine delivery, I considered the fridge nothing more than a place where lettuce goes to die. But it’s a critical component in a complex system designed to ensure that vaccines save lives and it helps demonstrate how different types of expertise fit together to achieve collective impact.” He discusses how a “broad range of global partners play a big role in cost-effectively and efficiently getting safe vaccines to all children,” and he adds, “The power of partnership simply can’t be understated…” (4/29).