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No one鈥檚 safe until everyone is safe - it鈥檚 a phrase we are getting used to hearing. We are all going to look after each other and make sure everyone gets the vaccines they need. But this noble sentiment seems to be buckling under first contact with political reality, as rich countries jockey for position at the front of a very long queue. The elbows are out - just ask AstraZeneca. In this episode of How To Vaccinate the World, Tim Harford and a panel of expert guests, have a lively discussion about the dangers and perhaps the advantages of vaccine nationalism.

Producers: Sandra Kanthal and Josephine Casserly

Listeners questions can be emailed to vaccine@bbc.co.uk