Sulfur dioxide (SO2) is a gas that can have several health effects when people are exposed to it. Here are some of the possible effects:

1. Respiratory Issues: One of the most common health risks associated with sulfur dioxide exposure is difficulty breathing, which can be particularly prevalent in people with asthma. SO2 can narrow the airways and cause wheezing, chest tightness, and shortness of breath.

2. Lung Disease: Chronic exposure to SO2 can lead to serious lung diseases as it can harm the lung’s air sacs making a person more vulnerable to pulmonary diseases.

3. Eye Irritation: SO2 exposure can cause burning, watering, and stinging sensations in the eyes.

4. Throat and Nose Irritation: Exposure can lead to coughing, mucus secretion, throat irritation, and sneezing.

5. Allergic Reactions: For some, sulfur dioxide can cause an allergic reaction resulting in rashes, hives, a runny or blocked nose, and dermatitis.

6. Cardiovascular Effects: Some studies show a link between short-term sulfur dioxide exposure and increased risk of hospital admissions for cardiovascular diseases.

Note: The health effects can vary based on the concentration of SO2 and duration of exposure. Short-term exposure to high concentrations of SO2 can result in immediate harm, but long-term exposure to lower concentrations can also negatively impact health. Protecting air quality and limiting exposure to pollutants like SO2 is key to protecting public health.