首页
登录
职称英语
Influenza and Vaccines There is no specific cure for in
Influenza and Vaccines There is no specific cure for in
游客
2024-01-04
36
管理
问题
Influenza and Vaccines
There is no specific cure for influenza. Recommended treatment usually consists of bed rest and increased intake of nonalcoholic fluids until fever and other symptoms
lessen
in severity. Certain drugs have been found effective in lessening flu symptoms, but medical efforts aimed against the disease focus chiefly on prevention by means of vaccines that create immunity. No drugs can cure influenza, but certain antiviral medicines can relieve flu symptoms. Available by prescription, these drugs provide modest relief, but only if taken on the first or second day of symptoms. The drugs amantadine (sold under the brand name Symmetrel) and rimantadine (Flumadine), both in pill form, work against hemagglutinin and are effective in treating type A influenza. Two other drugs inhibit neuraminidase and are effective against both type A and type B strains: oseltamivir (Tamiflu) is in pill form and zanamivir (Relenza) is an inhalant. A flu vaccine consists of greatly weakened or dead flu viruses, or fragments of dead viruses. Antigens in the vaccine stimulate the patient’s immune system to produce antibodies against the viruses. If the flu viruses invade a vaccinated person at a later time, the sensitized immune system recognizes the antigens, produces the antibodies and quickly responds to help destroy
them
. About 5 to 10 percent of people who receive a flu vaccine experience
mild
, temporary side effects, typically soreness at the injection site. Young children who have not previously been exposed to the influenza virus are most likely to experience side effects. Flu viruses constantly change so different virus strains must be incorporated in vaccines from one year to the next. Scientists try to provide a good match between the vaccine and the most serious virus strains circulating at the time. But because it takes months to manufacture and distribute vaccines, decisions on their composition must be made well before the start of each flu season. Each February experts at the World Health Organization (WHO) recommend a vaccine composition to be used for the forthcoming winter in the Northern Hemisphere; a second recommendation is made in September for vaccines to be used in the Southern Hemisphere. Typically vaccines contain antigens from three virus strains, usually two strains from type A and one strain from type B. According to the CDC, the success of flu vaccines varies from one person to another. In healthy young adults, the vaccines are 70 to 90 percent effective in preventing the disease. In the elderly and people with certain chronic medical conditions, the vaccines are less effective in preventing illness but help reduce the severity of an infection and the risk of major complications or death. Studies show that flu vaccines reduce flu-related hospitalization by about 70 percent and flu-related deaths by about 85 percent among elderly people. The CDC recommends annual flu shots for people who are at high risk for developing serious complications as a result of an influenza infection.
(A) [■]This group includes all people aged 65 and older; people in nursing homes and other facilities that house people with chronic medical conditions; people with chronic heart, lung or kidney disease, diabetes, an impaired immune system, or severe forms of anemia; children and adolescents with conditions treated for long periods of time with aspirin (which makes them vulnerable to Reye’s syndrome) ; and women who will be in the second or third trimester of pregnancy during the influenza season.
(B) [■] Some doctors encourage individuals who travel to areas of the world where influenza viruses circulate to receive the most current vaccine.
(C) [■] Vaccination taken earlier can better protect the travellers from being infected by influenza in the epidemic areas
(D) [■] vaccination is more urgently needed particularly if they are at higher risk of complications It takes the human immune system one to two weeks after vaccination to develop antibodies to the flu antigens. According to the CDC, the best time to get flu shots in the United States is between October 1st and mid-November—sufficiently in advance of the peak of influenza activity, which in the United States generally lasts from late December until early March. Flu shots must be given
annually
for two reasons. First, antibody protection that is provided by the vaccine decreases during the year following vaccination. Second, vaccines created for pre-existing viral strains may not work against new strains; nor does an infection with one flu strain confer immunity to infection by another strain. [br] According to Paragraph 5, the WHO recommends the composition of the vaccine very early every year in order to
选项
A、provide a good match between the vaccine and the virus strains
B、save the expense in producing and distributing the vaccine
C、reduce the frequency the flu viruses change from one strain to another
D、leave time to manufacture and distribute vaccines before the flu season
答案
D
解析
本题还是事实信息题。题目问:根据第五段的内容,世界卫生组织每年早早公布疫苗的组成成分,其目的是什么?根据原文的句子“But because it takes months to manufacture and distribute vaccines, decisions on their composition must be made well before the start of each flu season(因为生产和分发疫苗需要几个月的时间,所以必须在每一个流感季节开始之前决定疫苗的成分)”可知,WHO提前公布疫苗成分是为了留出足够的时间来生产和分发疫苗,因此选D项。
转载请注明原文地址:https://tihaiku.com/zcyy/3332704.html
相关试题推荐
Meteorologistscanprogramtheircomputestoscanfora(specific),setofweath
InfluenzaandVaccinesThereisnospecificcureforin
InfluenzaandVaccinesThereisnospecificcureforin
InfluenzaandVaccinesThereisnospecificcureforin
InfluenzaandVaccinesThereisnospecificcureforin
InfluenzaandVaccinesThereisnospecificcureforin
InfluenzaandVaccinesThereisnospecificcureforin
InfluenzaandVaccinesThereisnospecificcureforin
InfluenzaandVaccinesThereisnospecificcureforinfluen
InfluenzaandVaccinesThereisnospecificcureforinfluen
随机试题
[originaltext]Kuwaitisacountrywhichisquitesmall,butwhichisveryr
某公司只生产和销售一种产品,销售价格为75元/件,全年产销量为400万件
对风疹和麻疹具有临床鉴别意义的是A.血清特异性抗体检测 B.发病季节 C.面
学前儿童教学活动内容的选择既要适合儿童的现有水平,又要有一定的挑战性。
患者,女性,47岁,久站后左下肢出现酸胀感,小腿内侧可见静脉轻微突起,诊断为下肢
含有罂粟壳的方剂是A.止嗽散B.四神丸C.固冲汤D.真人养脏汤E.金锁固精丸
发布对具体股票作出明确估值和投资评级的证券研究报告时,公司持有该股票达到相关上市
一般情况下,个人医疗贷款的期限最短为( ),最长可达( )。.半年;2年
下列关于无形资产摊销的表述中,正确的是()。A.无法预见为企业带来经济利益期限
(根据2015年教材,该题目政策过时)某油田2012年10月开釆原油6.5万吨,
最新回复
(
0
)