People who are at highest risk for thrombocytopenia are those affected by one of the conditions or factors discussed in "What Causes Thrombocytopenia?" This includes people who:
- Have certain types of cancer, aplastic anemia, or autoimmune diseases
- Are exposed to certain toxic chemicals
- Have a reaction to certain medicines
- Have certain viruses
- Have certain genetic conditions
People at highest risk also include heavy alcohol drinkers and pregnant women.