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More than a quarter of the world\u2019s malaria cases happen in Nigeria according to the World Health Organisation. This week the country became the second, after Ghana to provisionally approve the use of malaria vaccine R21. Professor Matt Fox explains why scientists have called the vaccine a \u2018world changer\u2019.\nWe hear from dementia nurse Kemi Reeves who supports people living with dementia in Los Angeles. Her project has recently been shown to reduce the cost of caring for people with Alzheimers. We also hear about a new piece of research from the UK showing that hearing aids may protect against a higher risk of dementia.\nAs we learn more about \u2018Long Covid\u2019, we explore evidence that links breathlessness with having had disrupted sleep.\nAnd have you ever been told you grind your teeth? Author Naomi Alderman was shocked recently when visiting the dentist to be told she had a condition called bruxism and hadn\u2019t even realised. We ask whether experiencing the Covid pandemic may have led to more of us griding and clenching our teeth.

Image Credit: Halfpoint Images

Presenter: Claudia Hammond\nProducer: Clare Salisbury