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British scientists talk to many people around the world. They want to know what they think about the vaccine. Most people say that vaccines are safe and effective. However, people living in poor countries trust the vaccine more.

People in rich countries do not always vaccinate their children. The disease is recurring. Vaccines can stop these diseases. However, the people of rich countries do not believe in vaccines.

The WHO says this is a problem. This is one of the top ten health issues this year.

Difficult words: Vaccines (drugs that help your body fight disease before you get sick), effective (when things work well), diseases (severe illnesses).