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One day, all diseases on Earth will be gone. I wonder. In fact, if all diseases die out or doctors find vaccines and cures for them, that will really change our planet. Think about the amount of overpopulation if no one died from diseases. There’d be a population explosion. I don’t think the Earth would be able to feed so many people. It’s a really difficult question. Some diseases in the world are really horrible and cause a lot of suffering. It would be great if scientists found cures for those. Scientists have already found a cure for many diseases. It’s amazing how far science and medicine have come. I think more cures for diseases could be found if governments spent more money. They seem to spend so little on controlling disease.
n. 人口 ，(全体)居民，人数
