【简答题】
( ) is not the same as the flu, ( ) a more severe illness. 2. Although ( ) is similar to the flu, flu symptoms are more ( ) . 3. Like ( ) , a pandemic is the spread of an infectious disease. However, in ( ) , the number of people affected is much smaller. 4. ( ) is not the same as bronchitis, ( ) a very bad cough. Unlike ( ) , bronchitis is treated with antibiotics. 5. A ( ) is a special type of medicine, while injection refers to any type of medicine that is given with a needle under the skin. In fact, there are some ( ) that are given by mouth, not by injection.
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