About the series

As the pandemic worsened, pressure grew to speed a COVID- 19 vaccine from the lab to humans in record time. The team behind Moderna’s vaccine was the first to launch a Phase 1 trial in the United States. This is their story.

• Today: They created a vaccine in a day, relying on a decade of breakthroughs.

• Tuesday: They knew the vaccine was safe, but would it work?

Explore how the COVID- 19 vaccine works in augmented reality Download the latest version of the USA TODAY app.

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