There are calls for more donors with a rare blood type to come forward in Yorkshire.
New figures show there has been a dramatic increase in demand for Ro and Kell negative blood across the county over the last four years.
The blood is used to help people with a rare, painful blood disease called sickle cell anemaia - but only 2% of current donors have this blood type.
In Sheffield there has been a 419 per cent increase in demand over the last four years.
Meanwhile in Leeds it is up 167 percent.
Solome Mealin - from Leeds - relies on these blood donations to live - and is joining a campaign to raise awareness and get more people to donate.
- Video report by Katharine Walker