How does the Covid-19 vaccine work? We interviewed Bill Gates to get his thoughts on the vaccine and pandemic. Read Bill and Melinda Gates Annual Letter here: http://gatesnot.es/2Yoy65f | What's Inside?

At the first Global Vaccine Summit the world came together and pledged more than $4 billion to end polio by 2018. When we eradicate polio—and I’m confident that we will—it will be a critical milestone in the Decade of Vaccines, a vision to reach all children with the vaccines they need by 2020. Watch this video about the summit: http://b-gat.es/ZZhjz8 | Bill Gates