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Could a single vaccine block nearly all viruses?
Health Check
Feb 25, 2026

A universal nasal spray vaccine that could block nearly all viruses, and possibly also bacteria and allergens has been successful at early stages of research. By leaving immune cells ‘on alert’, they become ready to jump into action no matter what infection tries to get into the body. Dr Matthew Fox, Professor in the Departments of Epidemiology and Global Health at Boston University, explains what this could mean for the future of disease prevention.

Four years into the Ukraine war, the founder of global initiative ‘Think Equal’ Leslee Udwin explains the programmes currently in place to help children to grow through their traumatic experiences. Plus, a teacher in Kharkiv, Violetta Kaleda, as well as some of the children within the programmes, describe the impact of bringing social and emotional learning into education.

Prevention campaigns are resuming after the cholera outbreak in Mozambique has now been declared an epidemic by the country’s national director of public health. Reporter Jose Tembe give the latest on the outbreak after the years-long shortage of cholera vaccines begins to rebound.

As commercial spaceflight grows and human fertility in space becomes a more pressing concern, embryologist Giles Palmer explains the current understanding of the effects of spaceflight on human reproductive systems. Plus, a new study on ultra-endurance marathon running shows it may accelerate aging and the breakdown of red blood cells.

Presenter: Laura Foster Producer: Hannah Robins Assistant Producers: Georgia Christie and Anna Charalambou

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Joined by Professor of Global Health and Epidemiology at Boston University in the US, Dr Matthew Fox, Claudia hears about a mystery illness that is being investigated by health officials in Burundi, which has caused five deaths and sickened thirty-five people. So far lab analysis of the illness - which causes fever, vomiting, and diarrhoea - has been negative for Ebola and Marburg viruses, Rift Valley fever, and others.

We hear about influential analysis from Cochrane which has concluded that "breakthrough" Alzheimer's drugs are unlikely to benefit patients. Researchers said the impact was "well below" what was needed to make a difference to dementia patients' lives. However, their report has also provoked a vicious backlash from equally esteemed scientists who label it as fundamentally flawed.

We’re joined by health journalist Katie Silver in Mexico, who brings us the news that the President, Claudia Sheinbaum, has announced the details of a plan to introduce universal healthcare – no mean feat in country of 130 million people.

And we hear about an experiment that was done by academics to see if they could trick AI chatbots into believing in an entirely fake disease.

Presenter: Claudia Hammond Producer: Jonathan Blackwell


26min 28sec

Could a single vaccine block nearly all viruses?

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