15:30Inside HealthIncrease in childhood viruses and can you be too fit?BBC Radio 4 Duration: 28 minutes Wed 14th Jul 2021, 15:30 on BBC Radio 4 LWAvailable for over a yearListen nowWhy is there an increase in childhood viruses? Plus, can you be too fit? Show more GenresFactualHealth & WellbeingBrandInside Health Source: BBC Online