My grandmother Soniya is affected by a slow onset of pain, swelling and deformity in one or more joints. Could you guess what is the disease and how it can be prevented?

Explanation

### Step-by-Step Solution:

1. **Identify Symptoms**: The symptoms described include slow onset of pain, swelling, and deformity in one or more joints. These symptoms are key indicators of a joint-related disease.

2. **Disease Identification**: Based on the symptoms of pain, swelling, and deformity in the joints, the most likely disease affecting your grandmother Soniya is **Rheumatoid Arthritis**. This autoimmune disorder primarily affects the joints, leading to inflammation, pain, and eventual joint deformity.

3. **Understanding the Condition**: Rheumatoid arthritis causes stiffness and difficulty in moving the affected joints. It can affect multiple joints, including fingers, knees, and elbows, leading to structural abnormalities over time.

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