首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Shortages of flu vaccine are nothing new in America, but this year’ s is a whopper. Until last week, it appeared that 100 millio
Shortages of flu vaccine are nothing new in America, but this year’ s is a whopper. Until last week, it appeared that 100 millio
admin
2011-01-02
50
问题
Shortages of flu vaccine are nothing new in America, but this year’ s is a whopper. Until last week, it appeared that 100 million Americans would have access to flu shots this fall. Then British authorities, concerned about quality-control problems at a production plant in Liverpool, barred all further shipments by the Chiron Corp. Overnight, the U.S. vaccine supply dwindled by nearly half and federal health officials found themselves making an unusual plea. Instead of beseeching us all to get vaccinated, they’ re now urging most healthy people between the ages of 2 and 64 not to. "This reemphasizes the fragility of our vaccine supply," says Dr. Martin Myers of the National Network for Immunization Information, "and the lack of redundancy in our system."
Why is such a basic health service so easily knocked out? Mainly because private companies have had little incentive to pursue it. To create a single dose of flu vaccine, a manufacturer has to grow live virus in a 2-week-old fertilized chicken egg, then crack the egg, harvest the virus and extract the proteins used to provoke an immune response. Profit margins are narrow, demand is fickle and, because each year’s flu virus is different, any leftover vaccine goes to waste. As a result, the United States now has only two major suppliers ( Chiron and Aventis Pasteur)--and when one of them runs into trouble, there isn’ t much the other can do about it. "A vaccine maker can’t just call up and order 40 million more fertilized eggs," says Manon Cox, of Connecticut-based Protein Sciences Corp. "There’s a whole industry that’s scheduled to produce a certain number of eggs at a certain time. "
Sleeker technologies are now in the works, and experts are hoping that this year’s fiasco will speed the pace of innovation. The main challenge is to shift production from eggs into cell cultures--a medium already used to make most other vaccines. Flu vaccines are harder than most to produce this way, but several biotech companies are now pursuing this strategy, and one culture-based product (Solvay Pharmaceuticals’ Invivac) has been cleared for marketing in Europe.
For Americans, the immediate challenge is to make the most of a limited supply. The government estimates that 95 million people still qualify for shots under the voluntary restrictions announced last week. That’ s nearly twice the number of doses that clinics will have on hand, but only 60 million Americans seek out shots in a normal year. In fact, many experts are hoping the shortage will serve as an awareness campaign--encouraging the people who really need a flu shot to get one.
From the last paragraph we can infer that ______.
选项
A、the government hopes to solve the problem by way of volunteer restrictions
B、more than 47 million Americans who are qualified to get flu vaccine shots can not get them this year
C、America has to deal with a limited supply of flu vaccines this year
D、normally only a small percentage of American population gets flu vaccine shots each year
答案
B
解析
由第四段第二句“The government estimates that 95 million people still qualify for shots under the voluntary restrictions announced last week.”中可以知道大约有九千五百万人有资格注射疫苗。根据第四段第三句:“That’s nearly twice the number of doses that clinics will have on hand,but only 60 millio
转载请注明原文地址:https://kaotiyun.com/show/ndHd777K
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
TheScienceofPersuasionIfleadershipconsistsofgettingthingsdonethroughothers,thenpersuasionisoneoftheleader’se
YouthEmancipationinSpainTheSpanishGovernmentissoworriedaboutthenumberofyoungadultsstilllivingwiththeirpa
HowaTerribleBattleHelpedtoChangeEuropeNinetyyearsagoonasunnymorninginNorthernFrance,somethinghappenedtha
HowaTerribleBattleHelpedtoChangeEuropeNinetyyearsagoonasunnymorninginNorthernFrance,somethinghappenedtha
HowaTerribleBattleHelpedtoChangeEuropeNinetyyearsagoonasunnymorninginNorthernFrance,somethinghappenedtha
BeautyBeautyhasalwaysbeenregardedassomethingpraiseworthy.Almosteveryonethinksattractivepeoplearehappierandh
ThroughoutBritain’shistory,therehasbeennoguaranteethataninvasionwouldnothappen.TheBritishempireissostrongth
ThroughoutBritain’shistory,therehasbeennoguaranteethataninvasionwouldnothappen.TheRoyalAirForcewilllaunchma
DNAFingerprintingDNAisthegeneticmaterialfoundwithinthecellnucleiofalllivingthings.Inmammalsthestrandsof
DNAFingerprintingDNAisthegeneticmaterialfoundwithinthecellnucleiofalllivingthings.Inmammalsthestrandsof
随机试题
促进肾小管分泌H+的主要因素是
有关更年期综合征,正确叙述是:
血栓闭塞性脉管炎的止痛措施错误的是
【2004年第30题,2011年第39题】确定图3-271所示结构的超静定次数:
依法设立的保险经纪分支机构,应当自开业之日起( )内在中国保监会指定的报纸上予以公告。
整个国民经济的生产活动最终成果的计算公式为:∑(某种产品的数量×该种产品的单价)。( )
下列不属于证券公司代销金融产品应当遵循的原则是()。
甲数与乙数的比是3:7,乙与丙的比是4:3,甲与丙的比是()
请用200字以内的篇幅概括给定资料反映的主要问题。要求:表达准确,语言简练。请从政府部门的角度谈谈如何提高慈善捐款管理的透明度。要求;简要明确,合理可行,字数不超过400字。
Thedifferencebetweenaliquidandagasisobvious(1)_____theconditionsoftemperatureandpressurecommonlyfound(2)_____o
最新回复
(
0
)