Thisisthefirststudytoidentifycausaleffectsin a populationratherthanin a clinicalsetting, highlightingthecorrelationbetweenwearingfacemaskson a dropinnewinfections.
Oneexampleiswetestwhenpeoplegoto a doctorandhavesymptoms, andthenwetesttheindividualswhohadcontactwiththepersonwhoisinfectedorwetestindividualsthatreturnfromholidays.
Sosowhilethevirusisreproducingrapidlybutbeforetheybegintoshowsymptomsforsomereason, trulyasymptomaticpeopleneverdevelopedsymptomsbutapparentlygothrough a similarstageofsheddingthevirus.
A recentstudypublishedbyCDCspecialiststriedtoeanswerthatquestion.
CDCの専門家が発表した最近の研究では、その疑問に答えようとした。
Theresearchershadtomake a coupleofeducatedguesses, butbasedondatafromotherstudies, theyassumedthatcloseto a thirdofallpeoplewhocatchthevirusremaintrulyasymptomaticandthatthey'rearound 75% asinfectiousasthosewithfullblowndisease.