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被遗忘的疾病—血吸虫病(3)

Some diseases can kill a person.

But there are other diseases that make life painful. Schistosomiasis is this kind of disease.

Schistosomiasis causes many different problems in a person's body.

But to understand what happens to a person's body, we must first know how a person gets schistosomiasis.

Schistosomiasis is caused by a very small organism.

This organism lives in dirty water.

If a person's skin touches this dirty water, that person is at risk.

The organisms may enter his body.

The organisms sense movement from a person.

They like the chemicals from a person's body.

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