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But the study showed that another part of our blood - the platelets that normally stop bleeding - were suppressing the T-cells and making it harder for them to take out the cancer.

In all, Adele was given 28 units of red blood cells, 20 units of fresh frozen plasma, nine units of cryoprecipitate and eight units of platelets - the biggest transfusion at the hospital since 2000.

Antiplatelet drugs are medicines used to prevent strokes and stop platelets from clumping together.

In early April 2021, safety regulators in the UK and Europe had concluded that blood clots combined with low platelets should be listed as a rare side effect.

A similar trial for blood platelets is being planned.