CentersforDiseaseControlsaysblooddonorsarenot a randomsampleofthepopulation, sothis 20% figureisn't a strictscientificstudy, butitdoesreflectthediseasesspreadinAmerica.
A personisgenerallyprotectedforlifeafteroneencounterwithviruseslikechickenpoxorpolio, However, therearesomevirusesthatareimmunesystemsseemtoeasilyforget.
A warningmeansthere's animminentemergency, andyouneedtoseekshelterimmediately.
警告意味著有一個迫在眉睫的緊急情況, 你需要立即尋求庇護。
Theweatherhasturnedbad.
天氣變壞了。
Goaheadandidentifyyoursafeplaceincaseyourplaceunder a warning, downloadyourfavoriteweatherappanddoublecheckthatyouremergencynotificationsareturnedonsoyou'realertedassoonas a warningisissued.
It's themostamazingthing I encountered, I found I'veseeninmylifeintheseremotecavesneartheDeadSea, Israeliresearchersfounddozensoffragmentsof a deadseascrollbearingbiblicaltextwritteninGreekanddatingbacknearly 2000 years.