Avian flu is evolving but what risk does it pose to us?

The H5N1 strain of avian flu isn't new. It was discovered in China in 1996. But in recent years it's started passing from mammal to mammal and it's now rife on cattle farms in the United States. How much should humans worry?David Aaronovitch speaks to:Professor Wendy Barclay, action medical research chair in virology at Imperial College London Kai Kupferschmidt, science journalist and molecular biologist Dr Caitlin Rivers, epidemiologist at the Johns Hopkins School of Public Health. Professor Ian Brown, avian virology group at The Pirbright InstituteProduction team: Sally Abrahams, Kirsteen Knight and Ben Carter Editors: Richard Vadon and Emma Rippon Production Co-ordinator: Gemma Ashman Sound engineers: Rod Farquhar

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Step inside The Briefing Room for indepth explainers on the biggest news stories. A podcast and radio show hosted by Journalist and Author David Aaronovitch.Listen anytime: www.bbc.co.uk/sounds/brand/b07cblx9. **THE BRIEFING ROOM**Alongside a panel of academics, policy experts and journalists, each week we break down the essentials of the biggest news stories, in the United Kingdom and beyond. From international politics, healthcare, and technology; to the economy, education, and immigration. At the end of 2024 The Briefing Room covered the following topics: - What’s going on in Syria? www.bbc.co.uk/sounds/play/m0025l2l - Will new weight loss drugs bankrupt the NHS? www.bbc.co.uk/sounds/play/m0025vw7 - Is the push for the electric cars in trouble? www.bbc.co.uk/sounds/play/m002693mOur promise to you each week: If you step inside The Briefing Room, you'll be fully briefed on the biggest stories in the news.**SPECIAL EPISODES**As well as our weekly episodes, The Briefing Room has also recorded several mini-series that you can listen to anytime:- Global Tensions: https://www.bbc.co.uk/programmes/p0kh4p9s - Health: https://www.bbc.co.uk/programmes/p0kh4nwt**HOW TO LISTEN**New episodes are published every Thursday and are usually around 30 minutes long. Listen anytime here: www.bbc.co.uk/sounds/brand/b07cblx9. Catch us every Thursday and Monday on BBC Radio 4. Have a look at the latest BBC Radio 4 schedule for timings: www.bbc.co.uk/sounds/schedules/bbc_radio_fourfm. Also, you can now listen to us on a smart speaker. Just say, "Ask BBC Sounds to play The Briefing Room" for the latest episode. It works on most smart speakers.**GET IN TOUCH**We'd also love to hear from you. If you have a question or a comment for the team, please email us anytime at briefingroom@bbc.co.uk.