Page 33 - 新思维科学学生用书4 样章
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1 Living Things
Continued
Vaccinations today
• Is there a vaccination programme for children in your local area?
• If so, which diseases are children vaccinated against?
• How are the vaccinations for the different diseases given?
For example, an injection to prevent flu.
• How have the ways of giving vaccinations changed since the time of
the first vaccination?
Be prepared to share your findings with your class.
Infectious diseases
An infectious disease is a disease that is caused by very tiny living
things we call germs. The germs infect your body. This means
the germs get into your body and make you ill. We take
medicines to kill the germs that infect our bodies.
People, animals and plants can all have infectious
diseases. Flu, measles and malaria are some infectious leaf blast
diseases that humans can have. disease
Infectious diseases in plants can harm different parts
of the plant. For example, leaf blast can kill young
rice plants.
Bird flu is an infectious disease that infects birds,
humans and other animals. Almost all birds that get
bird flu die. Bird flu spreads easily from sick birds to
healthy birds. The farmer in the picture is checking
the chicken for signs of bird flu. Many farmers give
vaccinations to their chickens, geese and ducks to
prevent them from getting bird flu.
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