题目内容：
根据以下材料，回答题 EbolaOutbreak
1.YouarelikelyawarethatseveralcountriesinWestAfricaarebattinganEbolaOutbreak.Ebolaisadangerousandoftenlethalviralinfection.Scientistsbelievethathumanscontactedthevirusbyeatingthemeatofrareanimals.Itisnowbelievedthatbatsaretheprimarycarriersofthevirus.
2.Todate,thereareonlythreemajorcountriesinWestAfricaexperiencingamajoroutbreak:
SierraLeone,LiberiaandGuinea.However,othercountriessuchasNigeriahavereportedconfirmedcasesofEbolawithintheirborders.
3.UnlessyourecentlyvisitedoneofthethreeaffectedWestcountries,yourriskofcontactingthevirusisvirtuallyzero.UnlikeotherrecentairbornevirusoutbreakslikeSARS,theEbolaviruscanonlybespreadthroughdirectcontactwithaninfectedperson.Specifically,Ebolaisspreadthroughcontactwithbodyfluids.Thoughthevirusistransmittable,onlyaninfectedpersonexhibitingsymptomsiscommunicable.
4.ThesignsandsymptomsofEbolaarenon-specificandpatientstypicallyexhibitthemafteraweekofcontactingthevirus.Symptomsmayappearasearlyastwodaysoraslateasthreeweeksafterinitialinfection.Symptomsincludedisgust,weaknessandstomachpain.Moreuncommonsymptomsincludechestpain,bleedingandsorethroat.
5.Ebolaisdevastatingbecauseofitsabilitytoattackandreplicateineveryorganofthebody.
Thiscausesanoverstimulationofthebody'sinflammatoryresponse,causingtheflu-likesymptoms.Thevirusalsocausesbleedingandimpairsthebody'snormalclottingmechanism(凝血机制),makingbleedingevenmoresevere.Lossofbloodvolumeanddecreasedorganperfusion(器官灌注)ultimatelyleadtoorganfailureanddeath.
6.Thecurrentoutbreakisthedeadliestviraloutbreakinover35years.Whilediseasessuchasthemalaria(疟疾)arefarmorecommunicable,Ebolaisoneoftheworld'smostfatalviralinfections.Ebola'sfatalityrateexceedsthatofSARS.
Paragraph2__________ A．AmIatriskofcontactingthevirus?
B．Isthecurrentoutbreakthedeadlines?
C．HowdoIknowifIhavecontactedthevirus?
D．Whatareasarecurrentlyaffected?
E．WhatexactlydoesEboladotothebody?
F．WhatcausedtheEbolaoutbreak?
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