This is one of the most amazing papers I've ever seen. The authors got a standing ovation in the middle of an NBER… https://t.co/LSVEc3nfVd
How vaccines crushed polio in the US in the mid 1950s and measles in Nigeria after 2005. economist.com/graphic-detail… https://t.co/f3AsZRcEVV
How vaccines crushed polio in the US in the mid 1950s and measles in Nigeria after 2005. economist.com/graphic-detail… https://t.co/f3AsZRcEVV