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This video helps explain what happens when the virus that causes Covid-19 infects a cell, and how the mRNA vaccine works.

Acknowledgements: graphics and writing - Bronwyn Carlisle, voiceover - Miriam Sharpe, music - Outdoors in Summer by Shane Ivers at, titles - modified from

You can find more resources useful for high school biology students on our website, including biochemistry-related career advice, models of molecules to print in 3D, and links to other science resource websites.

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