Which two factors determine the severity of disease?

Explanation

To answer the question about which two factors determine the severity of a disease, we can break it down step by step:

### Step 1: Understanding Disease Severity
- **Definition**: The severity of a disease refers to the intensity or seriousness of the condition. It indicates how much the disease affects the body and the potential outcomes.

### Step 2: Identifying the First Factor - Pathogen
- **Pathogens**: These are the organisms that cause diseases, including bacteria, viruses, fungi, and parasites.
- **Example**: Different pathogens have varying capacities to cause disease. For instance, the rhinovirus causes the common cold, which is usually mild and resolves in a few days. In contrast, the HIV virus leads to AIDS, a severe condition that can ultimately result in death due to a weakened immune system.
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