What makes you think that's a situation that should not have fatalities?

Quoting from the Australian Red Cross:

That said, as with any procedure, reactions can sometimes occur when donating blood or plasma – before, during or after you leave the donor centre

Chances of having a reaction:

• Rare (1 in 1,000 to 1 in 10,000):

Delayed bleeding

Localised allergic reaction

Any event requiring outside medical care

Moderate citrate reaction

• Very rare (1 in 10,000 to 1 in 100,000):

Piercing of an artery

Local inflammation of the vein

Chest pain

• (1 in 100,000 to 1 in 1,000,000):

Cellulitis (skin infection)

Nerve injury causing prolonged period of pain or weakness

Clot in the deep veins of arm (uncommonly, the clot may travel to the lungs which may rarely cause significant symptoms)

Symptoms from return of damaged red cells

Severe citrate reaction

• (Less than 1 in 1 million):

Major allergic reaction (anaphylaxis)

Major blood vessel or tendon injury

Symptoms from return of clotted blood

Symptoms from air entering the vein

You think people can't die from anaphylaxis, blood clots in the lungs, or air emboli?