What are the primary caused of fever?
Primary causes may include:
1. An infection
2. Certain medications
3. Heat illness
4. Cancers
5. Autoimmune diseases
6. Some immunizations like Rabies vaccine.
Instruction: What are the primary caused of fever?
Context: 
Response: Primary causes may include:
1. An infection
2. Certain medications
3. Heat illness
4. Cancers
5. Autoimmune diseases
6. Some immunizations like Rabies vaccine.