These podcasts are linked to my blog Notes from a small scientist. In this episode, I provide a plain language summary of a paper we recently published, which explores how the differences in the genomes of the bacteria used to make the BCG vaccine, used for over 100 years to prevent tuberculosis, can change how effective it is at preventing disease. All my posts have links to online resources that you might find useful, and you can find the link to this particular post here.