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
考研
The realization that colds can kill has renewed interest in finding vaccines and treatments. The trouble is that the common cold
The realization that colds can kill has renewed interest in finding vaccines and treatments. The trouble is that the common cold
admin
2015-10-20
49
问题
The realization that colds can kill has renewed interest in finding vaccines and treatments. The trouble is that the common cold is caused not by one virus but by hundreds of different ones. This means a vaccine or drug that works a-gainst one of these viruses, or one family of viruses, is usually ineffective against all the others. What’s more, because colds are usually so mild, if treatments cause even minor side effects they can be worse than the disease. Such treatments will never get approval for general use, which is why most companies instead focus on drugs that relieve symptoms.
Nevertheless, some drugs and vaccines are being developed against the cold viruses most likely to
turn nasty
. A vaccine against Respiratory Syncytial Virus(RSV), a virus which can cause serious illness in young children and the elderly, is going through clinical trials. It consists of a weakened strain of the virus given as a nasal spray.
A treatment for RSV infections, based on RNA interference, is also in development. However, treatments for specific viruses are useless unless your cold is caused by the virus in question—and doctors have no quick way to work out which virus is to blame for a cold. Systems to do this are under development, mostly based on looking for specific DNA or RNA sequences, but none are near to reaching the market.
An alternative approach would be to keep taking drugs that prevent infection throughout the cold season, such as a derivative of the anti-smallpox drug cidofovir which has been shown to combat adenoviruses, viruses that can cause upper respiratory infections. But again, as adenoviruses are only responsible for a few percent of colds, the benefits hardly justify the expense and risk of side effects from remaining on a drug permanently.
Short of everyone on the planet isolating themselves for two or three weeks, so existing cold viruses run out of hosts and die out, it is hard to see how we can ever defeat the common cold. Even then, new cold viruses would evolve in time from animal viruses. Some even question whether it is desirable to try to eliminate colds. "It’s blind speculation," says Joel Weinstock of Tufts University in Boston in the US, "but the common cold may protect us from more serious viruses." An occasional sniffle might be a price worth paying if it keeps our immune defenses primed.
According to Joel Weinstock, it’s impossible and unnecessary to
选项
A、try to get rid of the common cold
B、produce vaccines to defeat cold.
C、protect us from common cold.
D、protect us from more serious viruses.
答案
A
解析
观点态度题。属于文中人物的观点,从最后一段可以推断出乔尔·温斯托克认为普通感冒也可能给人带来一些益处,原文的“盲目的推断”表明试图消除感冒是不可能的,也是没有必要的,A项正确。
转载请注明原文地址:https://kaotiyun.com/show/wtzZ777K
0
考研英语一
相关试题推荐
Accordingtothetext,whichofthefollowingistrueaboutthenewschool?AccordingtoParagraph3,theConservatives’respon
Assummerrollsaround,lawmakersinWashingtonarepreparingtovoteonajobsbillthatwouldinclude$1billionforsummerjo
Researchersinvestigatingbrainsizeandmentalabilitysaytheirworkoffersevidencethateducationprotectsthemindfromthe
Whichofthefollowingabout"PathtoGrowth"strategyistrue?Unilever’sCFOthinksthatWood’scommentsare
ToliveintheUnitedStatestodayistogainanappreciationforDahrendorfsassertionthatsocialchangeexistseverywhere.Te
Ithaslongbeenthesubjectofspeculationamongthepoliceandcriminologists:whatwouldhappenifalltheofficerswhonows
TheRelationshipBetweenDinesaursandBirdsTheonceradicalnotionthatbirdsdescendedfromdinosaurs—ormayevenbedino
[A]DrDanielStanley,anoceanographer,hasfoundvolcanicshardsinEgyptthathebelievesarelinkedtotheexplosion.Comput
Boysandgirlsusedtogrowupandsetasidetheirchildishpursuits.Notanymore.Thesedays,menandwomenholdontotheirin
随机试题
以下叙述中正确的是()。
设市场上每年对某厂生产的18寸彩色电视机的需求量是随机变量X(单位:万台),它均匀分布于[10,20],每出售一万台电视机,厂方获得利润50万元,但如果因销售不出而积压在仓库里,则每一万台需支付保养及其他各种损失费用10万元,问:18寸彩色电视机的年产量应
女性,68岁。原有肺心病病史。受凉后发热伴咳脓痰,发绀加重,次日神志模糊,嗜睡,血压12.0/9.0kPa,无病理反射。血气分析检查结果为:pH7.56,PaO27.33kPa(55mmHg),PaCO29.33kPa(70mmHg),HCO3-48m
患者,女性,23岁。1周前受凉感冒,未予特殊治疗。近日出现胸闷、心悸,心电图示窦性心律,频发室早,心率106次/分,体温36.5℃,血压100/60mini{g,听诊:第一心音低钝,未闻及明显杂音,怀疑病毒性心肌炎收入院。目前该病员应该
主动脉听诊区闻及收缩期喷射样杂音,向颈部传导,最可能的诊断是
下列不属于蒙药传统剂型的是()。
甲将自家的房产同时向乙、丙和丁作了抵押,其中,乙的抵押没有登记。后来由于不能按时偿还债务,房产被拍卖,共收入15万元,则以下表述正确的是()。
下列关于甲公司债务重组时的会计处理中,正确的是( )。20×6年末甲公司对固定资产进行改造时应转入在建工程的金额为( )万元。
Goodevening,ladiesandgentlemen!Firstofall,I’dliketo【B1】______asincerewelcometoyouall,thenewcomersofourc
A、Tobookatableforlunch.B、Tobookanairticket.C、Tomakeanappointment.D、Toasksomebodyforhelp.A
最新回复
(
0
)