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Ever since their creation, vaccines have saved countless lives all over the world! Still, people in many countries suffer from diseases that could be prevented by vaccination. We looked at 98 countries where a lot of people are infected with such diseases. We wanted to measure the benefits of vaccination for them. Using mathematical models, we found that vaccination saved 37 million lives between 2000 and 2019! We project that it could save 32 million more by 2030.

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