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How do vaccinations work? - Keeping healthy: Video playlist - BBC Bitesize
Matt Green explains how vaccinations combat diseases caused by pathogens.
↗ https://www.bbc.co.uk/bitesize/topics/zgmmdnb/watch/z7n28p3Matt Green explains how vaccinations combat diseases caused by pathogens.
↗ https://www.bbc.co.uk/bitesize/topics/zgmmdnb/watch/z7n28p3