A close friend has the following: vomiting blood, bloody diarrhea, low white cell count. Is there a possibility that someone is poisoning him? What type of poison has these symptoms?
There are various causes of these symptoms including certain viral and parasitic infections. In the late stages of certain infections, like HIV, or even with cancer, these symptoms will arise. It may also be due to various poisons. You can read more in these articles :
1. Vomiting Blood (Hematemesis)
2. Blood in Stool (Hematochezia)
3. Arsenic Poisoning (one of the possible poisons)