Bill Gates: 有很多理由充满希望。减轻儿童疾病负担的创新只是让我保持乐观的众多创新中的一部分。 gatesnot.es/3TZGOCF

原推：There are so many reasons to be hopeful. Innovations that reduce the burden of disease on children are just some of the many that keep me optimistic. gatesnot.es/3TZGOCF
https://twitter.com/BillGates/status/1569432377558204416