单选题

In the workplace, influenza is typically spread by infected individuals to others with whom they work in close quarters.Anew medication that suppresses the symptoms of influenza therefore will actually increase the number of influenza cases, because this medication will allow people who would other wise be home in bed to return to work while infected.

Which of the following, if true,mostseriously challenges the prediction？

A、 Coughing, a symptom of influenza that the new medication suppresses, is a primary mechanism in the spread of this illness
B、 Some medications that are used to suppress symptoms of influenza are also used by many people to treat symptoms that are caused not by influenza but by other illnesses
C、 Many workers who now remain at home when infected with influenza do so because the symptoms of influenza prevent them from performing their jobs effectively
D、 Most adults who are immunized against influenza in order to avoid being infected are over 65 years old and retired and thus do not work outside the home
E、 Symptoms of an illness are often the body's means of curing itself of the illness, and therefore suppression of symptoms can prolong the illness that causes them.

【正确答案】 A

【答案解析】