Contagious diseases are caused by germs or viruses. These diseased carriers enter human body with several ways.
Infectious diseases are caused by bacterial or viral spread, and these pathogens enter the body in a variety of ways.
(2)傳染性疾病乃因細菌或病毒散布所致，這些病原體會以各種不同的途徑進入體內。 （7 分）
The infectious diseases are caused by the spread of bacteria and germs, and these pathogens may get into human bodies by all kinds of different path.
Infectious diseases are caused by spread virus or germs, which can get in our body in different ways.
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