Page 38 - 新思维科学学生用书6 样章

1.4 Diseases

Continued

How are we doing?
Ask your partner these questions:

• Can you draw a dot plot of results?

• Can you say why we should use the different hygiene methods

to prevent diseases spreading?

Preventing insect bites

Some serious diseases, such as malaria,

yellow fever and sleeping sickness, are
spread by insects. Malaria and yellow

fever are spread by mosquitoes. Sleeping

sickness is spread by the tsetse fly. The
insects don’t cause the disease, but they

spread the disease parasite when they

bite you. The insects also do not get the
disease themselves. We say the insects are vectors.

The best way to prevent a disease spread by

insects is not to get bitten. These are some of
the ways you can prevent insect bites:

• sleep under bed nets
• wear long sleeves and long trousers

• keep doors and windows closed at night when mosquitoes are active
• use insect repellents on your skin to keep insects away

How can I use what I have learned in the future?

Did I learn anything that can help other people?

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