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Flu is hitting hard, sending over 5,400 people to hospital daily - more than three times last year’s numbers. Amid the chaos, Dr Oscar visits a flu camp, where volunteers are paid up to £5,000 to be deliberately infected with viruses - or placebos. He explores how these trials are shaping new vaccines, what it’s like to take part, and how far people will go to combat these relentless winter illnesses.

To watch this with subtitles, go to Â鶹¹ÙÍøÊ×Ò³Èë¿Ú iPlayer and search for Morning Live from 22/01/25.