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A large-scale trial of a new treatment it is hoped will help stop Covid-19 patients from developing severe illness has begun in the UK.
The first patient received the treatment at Hull Royal Infirmary on Tuesday afternoon.
It involves inhaling a protein called interferon beta which the body produces when it gets a viral infection.
The hope is it will stimulate the immune system, priming cells to be ready to fight off viruses.
Early findings suggested the treatment cut the odds of a Covid-19 patient in hospital developing severe disease – such as requiring ventilation