首页
登录
职称英语
Smallpox was the first widespread disease to be eliminated by human interven
Smallpox was the first widespread disease to be eliminated by human interven
游客
2023-12-27
15
管理
问题
Smallpox was the first widespread disease to be eliminated by human intervention. A highly contagious viral disease, it was endemic in Europe, causing the death of millions of people until the development of vaccination by Edward Jenner around 1800. In many non-European nations, it remained a dreaded, often fatal illness until very recently.
In May 1966, the World Health Organization (WHO), an agency of the United Nations, was authorized to initiate a global campaign to eradicate smallpox. The goal was to eliminate the disease in one decade. At the time, the disease posed a serious
threat
to people in thirty nations. More than 700 physicians, nurses, scientists, and other personnel from WHO joined about 200,000 health workers in the infected nations to battle the disease. Because similar projects for malaria and yellow fever had failed, few believed that smallpox could actually be eradicated, but eleven years after the initial organization of the campaign, no cases were reported in the field.
The strategy was not only to provide mass vaccinations but also to isolate patients with active smallpox in order to
contain
the spread of the disease and to break the chain of human transmission. Rewards for reporting smallpox assisted in motivating the public to aid health workers. One by one, each smallpox victim was sought out, removed from contact with others and treated. At the same time, the entire village where the victim had lived was vaccinated.
By April 1978, WHO officials announced that
they
had
isolated
the last known case of the disease, but health workers continued to search for new cases for two additional years to be completely sure. In May 1980, a formal statement was made to the global community. Today smallpox is no longer a threat to humanity. Routine vaccinations have been stopped worldwide. [br] The word "they" underlined in Paragraph 4 refers to______.
选项
A、health workers
B、officials
C、victims
D、cases
答案
B
解析
词义题型见第四段第一句:By April 1978,WHO officials announced that they had isolated the last known case of the disease.根据句子结构判断,they指的是前面提到的WHO officials,因此B为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3309900.html
相关试题推荐
Whatisthemostcommonriskfactorforseriousdisease?[br][originaltext]
Whatisthemostcommonriskfactorforseriousdisease?[br][originaltext]
ObesityisthecauseofthefollowingdiseasesEXCEPT______.A、feelingoutofbre
Over60millionAmericansalivetodaylivewithdiseasecausedbycigarettesmok
Anumberofriskfactorsareassociatedwithcardiovasculardisease(CVD).S
Anumberofriskfactorsareassociatedwithcardiovasculardisease(CVD).S
Anumberofriskfactorsareassociatedwithcardiovasculardisease(CVD).S
Anumberofriskfactorsareassociatedwithcardiovasculardisease(CVD).S
Anumberofriskfactorsareassociatedwithcardiovasculardisease(CVD).S
Anumberofriskfactorsareassociatedwithcardiovasculardisease(CVD).S
随机试题
Asthefilmneareditsend,it______(出现了意外的转变).tookanunexpectedturn考查词汇。“出现意
Arabiclanguageisoneoftheworld’smostwidelyusedlanguages.Itisthe
Ifyousitalldayatanofficeandworryaboutitseffectonyourweight
下列所得中使用超额累进税率的有()。A.工资、薪金所得B.个体工商业户的生产
在高温条件下宜采用黏度较小的乳化沥青,寒冷条件下宜使用黏度较大的乳化
煤层透气性系数大,表明煤层透气性好,瓦斯流动容易。煤层透气性主要取决于( )。
甲公司董事长乙明知公司已无继续经营的可能,虚构了标的额为1000万元的贸易合同
中期国债的偿还期限一般在( )A:1年以上5年以下B:1年以上10年以下C:
甲向乙于5月1日发出一要约,后反悔欲撤回,遂于5月3日发出撤回通知。要约于5月
下列措施中,在进行房地产开发项目投资控制时,发现实际投资值偏离目标投资值,应采取
最新回复
(
0
)