Or you might get it from touching a person with a cold or handling an object they touched and then touching your eyes, nose, or mouth. About 200 different viruses can spread the common cold, which makes it hard to create a vaccine for it. The most common cold virus is the rhinovirus...
The 11-year-olds, Ileyna and Flori, caught whooping cough in July while away at summer camp. They came home with very bad coughs, which at first were thought to be bronchitis but were later determined to be pertussis after an astute health professional decided to run one more test. "It ...
. the writer had run out of time 小题4:What did the writer learn from his experience?? . Life can sometimes be unfair.? . Anything is possible if one tries hard enough.? . A positive attitude will bring success.? . One should not make judgments based on appearance. 小题5:The best...
Do you have a sore throat, a running nose and a headache? Do you keep coughing and sneezing? If you do, the chances are that you have a cold or perhaps flu, but which one? Although both colds and flu are caused by viruses, they are very different illnesses. Colds, which usually ...
When bacteria or viruses attack the body, the immune system makes an automatic response to block the foreign substances. Mucus production is one of these responses. Cystic Fibrosis This condition is caused by a genetic disorder. The air passages in the lungs are filled with sticky mucus that of...