Kids can get ITP after a viral infection such as the flu or mumps, while in adults, triggers can include HIV, hepatitis or H. pylori. (I had an H. Pylori infection and did not know this).
His platelet count was ZERO. Normal platelet count 150,000 to 450,000 platelets per microliter of blood. The primary function of platelets is to help the blood clot. Such a low count as he had can cause a brain bleed and death which is what happened to him. They infused all the platelets in the county into him but to no avail.
^This^