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Mmalite nke SARS-CoV-2 B.1.1.7 Usoro ọmụmụ-

United States, Disemba 29, 2020-Jenụwarị 12, 2021

Summer E. Galloway, PhD 1;Prabasaj Paul, PhD 1;Duncan R. MacCannell, PhD 2;Michael A. Johansson, PhD 1;

John T. Brooks, MD 1;Adam MacNeil, PhD 1;Rachel B. Slayton, PhD 1;Suxiang Tong, PhD 1;Benjamin J. Silk, PhD 1;Gregory L. Armstrong, MD 2;

Matthew Biggerstaff, ScD 1;Vivien G. Dugan, PhD

Na Jenụwarị 15, 2021, ezigara akụkọ a ka MMWRMwepụta mbụ na webụsaịtị MMWR (https://www.cdc.gov/mmwr).

Na Disemba 14, 2020, United Kingdom kọrọSARS-CoV-2 iche iche nke nchegbu (VOC), usoro ọmụmụ B.1.1.7,A na-akpọkwa VOC 202012/01 ma ọ bụ 20I/501Y.V1.* TheA na-eche na ọdịiche B.1.1.7 pụtara na Septemba2020 ma bụrụ ngwa ngwa a na-ekesaSARS-CoV-2 dị iche na England (1).B.1.1.7 abụrụlaachọpụtara n'ihe karịrị mba 30, gụnyere United States.Dị kanke Jenụwarị 13, 2021, ihe dịka ikpe 76 nke B.1.1.7 nwereAchọpụtara ya na steeti US iri na abụọ.Ọtụtụ ahịrị ihe akaebegosi na B.1.1.7 na-ebufe nke ọma karịa ka a na-ebufe yaỤdị SARS-CoV-2 ndị ọzọ (1-3).The modeled trajectory nkeỤdị a dị na US na-egosipụta ngwa ngwa na mbido 2021,ịbụ ndịiche kachasị na March.Na-abawanyeMbufe SARS-CoV-2 nwere ike iyi nlekọta ahụike siri ikeakụrụngwa, chọrọ ogologo na mmejuputa siri ike karịnke atụmatụ ahụike ọha (4), ma mụbaa pasentị nkemgbochi ndị mmadụ chọrọ maka njikwa ọrịa.Na-ewereusoro iji belata nnyefe ugbu a nwere ike ibelata ikikemmetụta nke B.1.1.7 ma kwe ka oge dị oke egwu mụbaa ọgwụ mgbochimkpuchi mkpuchi.N'ịchịkọta, ihe nlebanya genomi ka emeliterejikọtara ya na nrube isi na ọha dị irèusoro ahụike, gụnyere ịgba ọgwụ mgbochi ọrịa, ndọpụ uche anụ ahụ,iji ihe mkpuchi, ịdị ọcha aka, na ikewapụ na iche iche, ga-dị mkpa iji gbochie mgbasa nke SARS-CoV-2, njenke na-ebute ọrịa coronavirus 2019 (COVID-19).Strategicule nke ndị na-enweghị mgbaàmà ma na elu n'ihe ize ndụ nkeọrịa, dị ka ndị ekpughere SARS-CoV-2 ma ọ bụ ndị nwereịkpọtụrụ ọha na eze ugboro ugboro na-apụghị izere ezere, na-enye ọzọohere igbochi mgbasa na-aga n'ihu.

onyunyo genomic zuru ụwa ọnụ na shar oghere mepere emepe ngwa ngwaUsoro usoro genome nke nje akwadoro ka ọ dị nso ozugbonchọpụta, ntụnyere, na nsochi nke SARS-CoV-2 na-etoliteỤdị dị iche iche nke nwere ike ịgwa mbọ ahụike ọha iji chịkwaaọgbaghara.Ebe ụfọdụ mutations na nje virus genomepụta wee laghachi azụ, ndị ọzọ nwere ike ịnye advan ahọpụtaratage na variant, gụnyere nkwalite mbufe, nke mere naụdịdị dị otú ahụ nwere ike chịkwaa ụdị ndị ọzọ na-ekesa ngwa ngwa.

N'oge ọrịa na-efe efe, ụdị dị iche iche nke SARS-CoV-2 nwereMgbanwe D614G na protein spike (S) na-abawanyennabata nnabata avidity ghọrọ ngwa ngwa na-achị n'ọtụtụmpaghara ala (5,6).N'ọgwụgwụ ọdịda 2020, ọtụtụ mba kọrọ nchọpụtaỤdị SARS-CoV-2 na-agbasa nke ọma.Na mgbakwunyeruo B.1.1.7 variant, pụtara ìhè variant gụnyere B.1.351Achọpụtara usoro ọmụmụ na South Africa na nke achọpụtara nso nso asubclade B.1.1.28 (ahagharịrị aha"P.1) achọpụtara na ndị njem anọsi Brazil n'oge a na-enyocha ya na Haneda (Tokyo)ọdụ ụgbọ elu.§ Ụdịdị ndị a na-ebu otu kpakpando nke mkpụrụ ndụ ihe nketa mutations, gụnyere na ngalaba nnabata protein S,nke dị mkpa maka njikọ nke angiotensin cell hostna-agbanwe ihe nnabata enzyme-2 (ACE-2) iji kwado nje virusntinye.Ihe akaebe na-egosi na mmụgharị ndị ọzọ dị na ndị aỌdịiche dị iche iche nwere ike inye ọ bụghị naanị mmụba mbufe mananwekwara ike imetụta arụmọrụ nke ụfọdụ nchoputa ozugbontụgharị ntụgharị-mmeghachi omume yinye polymerase (RT-PCR)nyochama belata ohere iji gbochie mgbochi mgbochi(2,3,5-10).Otu akụkọ ikpe na-adịbeghị anya dekọtara ikpe mbụ nkeSARS-CoV-2 reinfection na Brazil nwere ụdị SARS-CoV-2nke nwere ngbanwe E484K,** nke egosiriiji belata neutralization site convalescent sera na monoclonalọgwụ nje (9,10).

Akụkọ a lekwasịrị anya na mpụta nke ụdịdị B.1.1.7na United States.Dị ka Jenụwarị 12, 2021, ọ nweghịB.1.351 ma ọ bụ P.1 variants achọpụtara naUnited States.Maka ozi gbasara SARS-CoV-2 na-apụtaiche iche nke nchegbu, CDC na-edobe a webpage raara nyena-enye ozi gbasara ụdị SARS-CoV-2 na-apụta.††

 Usoro ọmụmụ B.1.1.7 (20I/501Y.V1)

Ụdị B.1.1.7 na-ebu mmụgharị na protein S(N501Y) nke na-emetụta nkwekọ nke nnabata nnabatangalaba.Nke a dị iche iche nwere 13 ọzọ B.1.1.7 lineage-definingmutations (Table), ọtụtụ n'ime ha dị na protein S,gụnyere nhichapụ n'ọkwa 69 na 70 (del69-70) namalitere ozugbo na ụdị SARS-CoV-2 ndị ọzọ ma ọ bụechiche na-eme ka ọ dịkwuo transmissibility (2,7).Nhichapụ ahụna ọnọdụ 69 na 70 na-akpata ọdịda S-gene target failure (SGTF)na ọ dịkarịa ala otu RT-PCR-dabere nchoputa nyocha (ya bụ, ya naThermoFisher Taq Path COVID-19 nyocha, ụdị B.1.1.7ant na ndị ọzọ dị iche iche na del69-70 na-emepụta ihe na-adịghị mmansonaazụ maka ebumnuche S-gene yana nsonaazụ dị mma maka abụọ ndị ọzọebumnuche);SGTF jere ozi dị ka onye nnọchiteanya na United Kingdommaka ịkọwapụta ikpe B.1.1.7 (1).Ọtụtụ ahịrị akaebe na-egosi na B.1.1.7 bụ karịaebutere nke ọma ma e jiri ya tụnyere SARS-CoV-2 ndị ọzọvariants na-ekesa na United Kingdom.Mpaghara UK nwereọnụ ọgụgụ dị elu nke usoro B.1.1.7 nwere ọrịa ngwa ngwauto karịa mpaghara ndị ọzọ, nchọpụta na SGTF mụbarangwa ngwa karịa nyocha ndị na-abụghị SGTF n'otu mpaghara ahụ, yana aNdị ọrịa index butere ọnụ ọgụgụ dị elu nke kọntaktịnwere ọrịa B.1.1.7 karịa ndị ọrịa index butereụdị ndị ọzọ (1,3).Variant B.1.1.7 nwere ikike ịbawanye pan UStrajectory demic n'ime ọnwa ndị na-abịa.Iji gosi mmetụta a,ewepụtara ihe nlere anya akụkụ dị mfe, nke nwere ụdị abụọ.Ọnụnọ nke US ugbu a nke B.1.1.7 n'etiti ndị niile na-ekesaA maghị nje virus mana echere na ọ bụ <0.5% dabere na yaọnụ ọgụgụ dị ntakịrị nke achọpụtara yana data SGTF (8).Makaihe nlere anya, echiche nke mbu gunyere oke B.1.1.7nke 0.5% n'etiti ọrịa niile, SARS-CoV-2 mgbochi sitere naọrịa mbụ nke 10%-30%, ịmụ nwa na-agbanwe ogenọmba (R t) nke 1.1 (mbelata ma na-abawanye nnyefe)ma ọ bụ 0.9 (mbelata mgbasa ozi) maka ụdịdị dị ugbu a, yana akụkọ ihe mere eme nke ikpe 60 n'ime mmadụ 100,000 kwa ụbọchị.Jenụwarị 1, 2021. Echiche ndị a anaghị anọchi anya yaebe ọ bụla US, mana kama, gosi mkpokọta nkeọnọdụ a na-ahụkarị na mba ahụ.Mgbanwe na R t gafereoge sitere na mgbochi enwetara na ịba ụba prevalence nke B.1.1.7, e mere ihe nlereanya, na B.1.1.7 R t chere.ka ọ bụrụ ihe na-adịgide adịgide 1.5 ugboro R t nke ụdị dị ugbu a, dabere naatụmatụ mbụ sitere na United Kingdom (1,3).Na-esote, e gosipụtara mmetụta ịgba ọgwụ mgbochi ọrịa nwere ike ịdịna-eche na a na-enye ọgwụ mgbochi 1 nde kwa otuụbọchị malite na Jenụwarị 1, 2021, yana mgbochi ahụ 95%.enwetara ụbọchị 14 ka ọ nwetachara ọgwụ 2.Kpọmkwem,ihe mgbochi megide ọrịa nwere ụdị dị ugbu a ma ọ bụ nkeB.1.1.7 variant e chere, ọ bụ ezie na irè naogologo oge nchebe megide ọrịa na-anọgide na-ejighị n'aka,n'ihi na ndị a abụghị isi njedebe nke ule ụlọ ọgwụmaka ọgwụ mgbochi mbụ.N'ihe nlereanya a, mgbasa ozi B.1.1.7 bụ mmalite dị ala, ma n'ihi naọ na-ebugharị karịa ụdị dị ugbu a, ọ na-egosipụtauto ngwa ngwa na mbido 2021, na-aghọ vari kachasịndanda na March (Fig 1).Ma nnyefe nke ugbu avariants na-abawanye (mbụ R t = 1.1) ma ọ bụ jiri nwayọọ nwayọọ na-ebelata(mbụ R t = 0.9) na Jenụwarị, B.1.1.7 na-ebute mgbanwe dị ukwuu.na trajectory nnyefe na usoro ọhụrụ nke exponentialuto.Site na ịgba ọgwụ mgbochi ọrịa na-echebe megide ọrịa, ndịỤzọ ọrịa mbụ na-adịghị agbanwe agbanwe na B.1.1.7 gbasaaka na-eme (Fig 2).Otú ọ dị, mgbe B.1.1.7 na-aghọụdị dị iche iche, ebufe ya belatara nke ukwuu.Mmetụta nke ịgba ọgwụ mgbochi ọrịa na mbenata nnyefe na nsooge kacha ukwuu n'ọnọdụ nke mgbasa ozi dịna-agbadalarị (mbụ R t = 0.9) (Fig 2).Mgbalị mbụ nanwere ike igbochi mgbasa nke B.1.1.7 variant, dị ka eluigwe na ala naụbara nnabata na atụmatụ mbelata ahụike ọha,ga-enye ohere karịa maka ịgba ọgwụ mgbochi ọrịa na-aga n'ihu iji nweta elumgbochi ọnụ ọgụgụ ndị mmadụ.

Mkparịta ụka

Ka ọ dị ugbu a, ọ nweghị ihe dị iche a ma ama na nsonaazụ ụlọ ọgwụjikọtara ya na ụdị SARS-CoV-2 kọwara;Otú ọ dị,ọnụ ọgụgụ dị elu nke nnyefe ga-eduga n'ọtụtụ ikpe, na-abawanyeọnụ ọgụgụ ndị mmadụ n'ozuzu chọrọ nlekọta ụlọ ọgwụ, karịana-ebelata ibu ahụ n'usoro nlekọta ahụike adịlarị,ma kpatara ọnwụ karịa.Nyocha genomic na-aga n'ihuiji chọpụta ikpe B.1.1.7, yana mmalite nke ndị ọzọvariants nke nchegbu na United States, dị mkpa makaNzaghachi ahụike ọha COVID-19.Ebe SGTF rụpụtaranwere ike inye aka chọpụta ikpe B.1.1.7 nwere ike ịkwadosite n'usoro, na-achọpụta ụdị dị iche iche nke na-anaghị egosipụtaSGTF na-adabere naanị na nleba anya dabere na usoro.

 

 

 

Nhọpụta dị iche iche

njirimara mbụ  

Mgbanwe njirimara

(protein: mutation)

Mba. nke usoro-ekwenyere ugbu a Mba nke

mba nwere

usoro

Ebe Ụbọchị United States Gburugburu ụwa  
B.1.1.7 (20I/501Y.V1) United Kingdom Septemba 2020 ORF1ab: T1001I, A1708D, I2230T,

nke 3675-3677 SGF

S: del69-70 HV, del144 Y, N501Y,

A570D, D614G, P681H, T761I,

S982A, D1118H

ORF8: Q27 nkwụsị, R52I, Y73C

N: D3L, S235F

76 15,369 36
B.1.351 (20H/501Y.V2) South Africa Ọkt 2020 ORF1ab: K1655N

E: P71L

N: T205I

S:K417N, E484K, N501Y, D614G,

A701V

0 415 13

 

P.1 (20J/501Y.V3 Brazil na Japan Jenụwarị 2021 ORF1ab: F681L, I760T, S1188L,

K1795Q, del3675-3677 SGF, E5662D

S: L18F, T20N, P26S, D138Y, R190S,

K417T, E484K, N501Y, D614G,

H655Y, T1027I

ORF3a: C174G

ORF8: E92K

ORF9: Q77E

ORF14: V49L

N: P80R

0 35 2

 

Ndebiri: del = ihichapụ;E = protein envelopu;N = protein nucleocapsid;ORF = oghe oghe oghe;S = protein dị elu.

Ahụmahụ dị na United Kingdom na ụdị B.1.1.7ewepụtara na akụkọ a gosipụtara mmetụta na-efe efe karịavariant nwere ike inwe na ọnụ ọgụgụ nke ikpe na a onu ogugu.Nkeụbara nnyefe nke ụdị a chọrọ ọbụna karịammejuputa atumatu siri ike jikọtara ọnụ nke ịgba ọgwụ mgbochi ọrịa na mitigausoro nhazi (dịka ọmụmaatụ, ịpụpụ anya, mkpuchi, na ịdị ọcha aka)iji chịkwaa mgbasa nke SARS-CoV-2.Usoro ndị a ga-abụdị irè karị ma ọ bụrụ na e hiwere ha ngwa ngwa kama emechaaiji belata mgbasa mbụ nke ụdị B.1.1.7.Mgbalị kakwadebe usoro nlekọta ahụike maka n'ihu surges na ikpe bụikike.Mmụba nnyefe pụtakwara na eluA ga-enwetarịrị mkpuchi ịgba ọgwụ mgbochi ọrịa karịa ka a tụrụ anya yanweta otu ọkwa nke nchịkwa ọrịa iji chebe ọha mmadụma e jiri ya tụnyere ụdị dị iche iche na-ebufe obere.Na mmekorita ya na agụmakwụkwọ, ụlọ ọrụ, steeti, ókèala,agbụrụ, na ndị mmekọ obodo, CDC na ụlọ ọrụ gọọmenti etiti ndị ọzọna-ahazi ma na-akwalite nyocha nke genomic naMgbalị njirimara nje virus n'ofe United States.CDCna-ahazi mbọ usoro US site na SARS-CoV-2Usoro maka nzaghachi mberede ahụike ọha,Epidemiology, na onyunyo (SPHERES)§§njikọ,nke gụnyere ihe dị ka ụlọ ọrụ 170 na-esonye ma na-akwalite ikesa data mepere emepe iji kwado ojiji SARS-CoV-2.data usoro.Iji soro SARS-CoV-2 viral evolushọn, CDC bụna-emejuputa nleba anya genomic multifaceted iji ghọtausoro nke epidemiologic, immunologic na evolushọnnke na-akpụzi phylogenies viral (phylodynamics);ndu ntiwapụnyocha;na ikwado nchọpụta na characterization nke o kwere omume reinfections, ogwu itunanya ikpe, naabụrụ nje variants.Na Nọvemba 2020, CDC guzobereMmemme SARS-CoV-2 Strain Surveillance (NS3).iji kwalite nnọchite anya SARS-CoV-2usoro.Mmemme na-arụkọ ọrụ na 64 US ọhaụlọ nyocha ahụike iji kwado usoro onyunyo genomic;NS3 na-ewukwa mkpokọta SARS-CoV-2 ụdị and usoro iji kwado nzaghachi ahụike ọha na sayensịnyocha iji nyochaa mmetụta gbasara mmụkọ nausoro mgbochi ọgwụ akwadoro dị adị.CDC nwerenwekwara nkwekọrịta na ọtụtụ nnukwu azụmahịa ụlọ ọgwụ laboratories ka usoro ngwa ngwa iri puku kwuru iri puku SARS-CoV-2-ihe nlere anya dị mma kwa ọnwa ma kwụọ ụgwọ agụmakwụkwọ asaaụlọ ọrụ na-eduzi genomic onyunyo na mmekoritaya na ụlọ ọrụ ahụike ọha, si otú a na-agbakwụnye nke ukwuu nannweta data onyunyo genomic n'oge sitere n'ofeUnited States.Na mgbakwunye na atụmatụ mba ndị a,ọtụtụ ụlọ ọrụ ahụike steeti na mpaghara na-ahazi usoro

IHE 1. Ihe atụ nke ọnọdụ ọnọdụ ihe atụ * nke ụdị SARS-CoV-2 dị ugbu a na ụdị B.1.1.7,na-eche na ọ nweghị ọgwụ mgbochi obodona nke mbụ R t = 1.1 (A) ma ọ bụ nke mbụ R t = 0.9 (B) maka ụdị dị ugbu a.-United States, Jenụwarị-Eprel 2021

 

ọgụgụ 1
ọgụgụ 2
ndebiri
ọgụgụ 1

SARS-CoV-2 iji ghọta ọrịa ọrịa mpaghara na nke ọmakwadoro nzaghachi ahụike ọha na eze maka ọrịa a.Ihe nchoputa dị na akụkọ a dị n'okpuru opekata mpe atọtations.Nke mbụ, ịdị ukwuu nke mmụba na transmissibility na United States ma e jiri ya tụnyere nke a hụrụ naUnited Kingdom ka edoghị anya.Nke abụọ, njupụta nkeB.1.1.7 na United States na-amaghịkwa n'oge a, manchọpụta ụdị dị iche iche na nleba anya na ọganihu ga-akawanye mmasite na mbọ nlebanya US emelitere.N'ikpeazụ, local mitigaUsoro ion na-agbanwekwa nke ukwuu, na-eduga n'iche na yaR t.Nsonaazụ akọwapụtara ebe a dabere na simulations ma chee na ọ nweghị mgbanwe na mbelata gafere Jenụwarị 1.Mmụba nnyefe nke agha dị iche iche nke B.1.1.7na-ekwusi ike na mmejuputa atumatu ahụike ọhabelata nnyefe ma belata mmetụta nwere ike nke B.1.1.7,ịzụrụ oge dị oke egwu iji welie mkpuchi ịgba ọgwụ mgbochi ọrịa.CDC'Sdata modeling na-egosi na iji zuru ụwa ọnụ nke na ụba compliance na usoro mbelata na ịgba ọgwụ mgbochi ọrịa dị oke mkpabelata ọnụ ọgụgụ ndị ọhụrụ na ọnwụ nke ukwuu naọnwa ndị na-abịa.Ọzọkwa, strategic ule nke ndị na-enweghịmgbaàmà nke COVID-19, mana ndị nọ n'ihe ize ndụ dị ukwuu makaọrịa SARS-CoV-2, na-enye ohere ọzọgbochie mgbasa na-aga n'ihu.Na mkpokọta, ihe nleba anya genomic emeliterelance jikọtara ya na ụbara nnabata na ahụike ọhaatụmatụ mbelata, gụnyere ịgba ọgwụ mgbochi ọrịa, anya anụ ahụing, iji ihe mkpuchi, ịdị ọcha aka, na ikewapụ iche na iche,ga-adị mkpa iji gbochie mgbasa nke SARS-CoV-2 nana-echebe ahụike ọha.

Nkwenye

Ndị otu usoro maka ihe mberede ahụike ọhaNzaghachi, Epidemiology na Consortium onyunyo;steeti na mpagharaụlọ nyocha ahụike ọha;Njikọ nke ụlọ nyocha ahụike ọha;Otu nzaghachi CDC COVID-19;Ngalaba nje na-eku ume,Nkewa nke Ọrịa Malitere ịrịa, CDC.Committee of Medical Journal Editors form maka mkpughe nke nwere ikeesemokwu nke mmasị.Ọnweghị esemokwu ọmụrụ nwa ekpughere.

Ntụaka

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Oge nzipu: Feb-11-2021