The case of Ebola in Dallas is an example of why we must treat disease globally in our modern world. This is best done by strengthening health care systems in areas that need it. Gavi, the Vaccine Alliance, has been doing the basic first step: partnering with developing countries to create and carry out sustainable plans to vaccinate all children. In the next four years Gavi will help developing countries vaccinate over 300 million children, saving 5 to 6 million lives in the process. The cost is $7.5 billion. A pledge of $1 billion from America will make this possible by inspiring other donors to give to this essential work. Citizens can do their part by calling or writing their elected representatives, asking them to fund this life-saving work.