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- They spent 12 years solving a puzzle. It yielded the first Covid-19 vaccines https://www.nationalgeographic.com/science/2020/12/these-scientists-spent-twelve-years-solving-puzzle-yielded-coronavirus-vaccines/ 44 comments
- They spent 12 years solving a puzzle. It yielded the first COVID-19 vaccines. https://www.nationalgeographic.com/science/2020/12/these-scientists-spent-twelve-years-solving-puzzle-yielded-coronavirus-vaccines/ 18 comments truereddit
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