lördag 28 februari 2026

WHO kuvaa Sars-2-cov viruksen varianttien prevalensseja neljältä viime epiviikoilta 23. helmikuuta 2026 näin:

VOI-variantti:

JN.1 , esiintymä 6,44% , ( lisääntynyt 0,76%).

VUM variantit:

XFG, Esiintymä 55.36%, ( vähentynyt 3,83%).

NB.1.8.1, esiintymä 19,31 % ,( lisääntynyt 1, 07 %)..

KP.3.1.1, esiintymä 3,86%, (lisääntynyt 3,18%)..

BA.3.2, esiintymä 2,15%, (vähentynyt .3.12%).

Muita esiintyy 12.88 %, (lisääntynyt 1.93%).

WHO:n Sars-2 raportti tullut neljältä epiviikolta 23.2. 2026.Euroopassa on merkitsevåä sairastumista useisiin hengitystieviruksiin

https://gisaid.org/sars-cov-2-phylogeny/global/

Because hCoV-19 mutates relatively slowly compared to some other RNA viruses, many mutations have little or no impact. However, some mutations or combinations of mutations have been associated with increased transmissibility, immune evasion, or changes in virulence — qualities that define variants of concern (VOCs) and variants of interest (VOIs) and that are included in this phylogenetic analysis according to WHO tracking variants updates.

Global prevalence of SARS-CoV-2 variants

No new SARS‑CoV‑2 variant data were available at the time of this update.

28 day prevalence of SARS-CoV-2 variants of interest and variants under monitoring with change on previous 28 days

World, 04 January to 01 February 2026

https://data.who.int/dashboards/covid19/cases?n=c

Number of COVID-19 cases reported to WHO

43,601

‎−2,171decrease on previous 28 days

Reported COVID-19 cases
World, 28 days to 8 February 2026

World, 28 days to 8 February 2026

WHO will utilize various sources to continue monitoring the COVID-19 epidemiological situation via the WHO COVID-19 dashboard. If data for certain countries is unavailable in this section, it may indicate that they have either ceased reporting COVID-19 surveillance data to WHO or have integrated the COVID-19 surveillance into existing respiratory disease surveillance. In the latter case, SARS-CoV-2 detections from sentinel and systematic virological surveillance sites in those countries may be found in the Circulation section which also includes information on SARS-CoV-2 variant circulation. This global summary of COVID-19 cases includes data on confirmed cases reported to WHO from the comprehensive COVID-19 case monitoring.

fredag 20 februari 2026

Valaiseva tuore artikkeli nykyisistä Sars-2-Cov varianteista , erityisesti " Stratuksesta" XFG

https://pmc.ncbi.nlm.nih.gov/articles/PMC12827822/

. 2026 Jan 10;16(1):8. doi: 10.1007/s44197-025-00510-x

The Emergence and Characterization of SARS-CoV-2 Variant XFG (“Stratus”): Comparative Virological, Epidemiological, and Public-Health Perspectives

Leena E Azhar ¹, Dania A Samkari ², Ahmed M Hassan ², Salma M Alsayed ^3,⁴, Esam Ibraheem Azhar ^2,^5,^✉

PMCID: PMC12827822 PMID: 41519993

Abstract

Background

SARS-CoV-2 continues to diversify under the selective pressure of population immunity, with recombination increasingly contributing to the emergence of new lineages. The recombinant lineage XFG (“Stratus”), detected in early 2025, has attracted attention because it combines genetic features from distinct Omicron descendants and has expanded across multiple regions.SARS-CoV-2 continues to diversify under the selective pressure of population immunity, with recombination increasingly contributing to the emergence of new lineages. The recombinant lineage XFG (“Stratus”), detected in early 2025, has attracted attention because it combines genetic features from distinct Omicron descendants and has expanded across multiple regions.

Objective

To synthesize the current virological, immunological, epidemiological, and clinical evidence on XFG, and to contextualize its public-health significance through comparison with the closely related Omicron-derived lineages JN.1 and NB.1.8.1.…

Approach

This narrative review integrates available molecular and immune data with surveillance observations and emerging clinical reports, translating technical findings into implications that are relevant for healthcare systems and the people they serve.

Key findings

Across available datasets, XFG shows modest immune escape and a moderate growth advantage, yet there is no signal of increased clinical severity compared with recent Omicron sublineages. Current evidence supports the continued effectiveness of vaccines and antivirals, reinforcing that incremental viral adaptation is compatible with stable clinical outcomes in immunologically experienced populations.

Conclusions

XFG exemplifies ongoing, “quiet” SARS-CoV-2 evolution—more consistent with antigenic fine-tuning than a shift toward greater virulence. For individuals, the practical message remains steady: stay updated with vaccination when eligible and seek timely care when at higher risk. For health systems, sustained genomic surveillance, targeted protection of vulnerable groups, and measured risk communication remain central to resilient coexistence with SARS-CoV-2.

Keywords: SARS-CoV-2 variants, Omicron recombinants, XFG (Stratus), JN.1, NB.1.8.1, Immune escape, Genomic surveillance, Public-health preparedness

Introduction

WHO antaa viitteellisen taulukon sars-2 cov varianteista tämän vuoden alkukuun epiviikoilta

Table 3. Weekly prevalence of SARS-CoV-2 VOIs and VUMs

Variant	Variant type	21 Dec 2025	28 Dec 2025	4 Jan 2026	11 Jan 2026	18 Jan 2026
BA.3.2
BA.3.2	VUM	5.27	3.96	3.37	3.36	2.17
JN.1	VOI	7.04	3.72	4.27	4.72	4.25
JN.1
KP.3.1.1
KP.3.1.1	VUM	2.06	2.01	1.32	0.87	0.76
LP.8.1
LP.8.1	VUM	0.53	0.24	0.06	0.25	0.09
NB.1.8.1
NB.1.8.1	VUM	15	16.8	18.1	20.6	21.1
XFG
XFG	VUM	62.2	65.3	65.6	63.1	61.7

GISAID kartalta Sars-2-cov varianttien vaiheesta 20.2.2026

https://gisaid.org/sars-cov-2-phylogenetics/glo bal/

GISAID kartat näyttävät varianttipuun latvojen turkoosinkirkkaita haaroittumia.

Pango kirjain koodien kertaus. yhden ja kahden kirjaimen koodit siihen asti kun niitä on otettu sars-2 varianttien nimitykseen.

https://www.blogger.com/blog/posts/9185631293657658555

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"MZ": "B.1.1.529.2.86.1.1.67.1",

"NA": "B.1.1.529.2.86.1.1.49.1.1.1.2",

"NB": "XDV.1.5.1",

"NC": "B.1.1.529.2.86.1.1.13.1.1.1.1",

"ND": "B.1.1.529.2.86.1.1.16.1.8.1.1",

"NE": "B.1.1.529.2.86.1.1.11.1.1.1.6",

"NF": "B.1.1.529.2.86.1.1.16.5",

"NG": "B.1.1.529.2.86.1.1.11.1.2.3.9",

"NH": "B.1.1.529.2.86.1.1.11.1.2.2.1",

"NJ": "B.1.1.529.2.86.1.1.11.2",

"NK": "B.1.1.529.2.86.1.1.11.1.2.3.10",

"NL": "B.1.1.529.2.86.1.1.9.2.1.3.1",

"NM": "B.1.1.529.2.86.1.1.11.1.2.3.4",

"NN": "B.1.1.529.2.86.1.1.11.1.2.3.13",

"NP": "B.1.1.529.2.86.1.1.11.1.3.3.2",

"NQ": "B.1.1.529.2.86.1.1.11.1.3.3.1",

"NR": "B.1.1.529.2.86.1.1.11.1.3.1.11",

"NS": "B.1.1.529.2.86.1.1.16.3",

"NT": "B.1.1.529.2.86.1.1.16.1.7.1.2",

"NU": "B.1.1.529.2.86.1.1.55.2",

"NV": "B.1.1.529.2.86.1.1.11.1.3.2.9",

"NW": "B.1.1.529.2.86.1.1.11.1.1.1.3.8.1.2",

"NY": "B.1.1.529.2.86.1.1.11.1.1.1.3.8.1.1",

"NZ": "B.1.1.529.2.86.1.1.9.2.1.3.4",

"PA": "B.1.1.529.2.86.1.1.11.1.3.1.1.10.1.1",

"PB": "B.1.1.529.2.86.1.1.11.1.3.3.8",

"PC": "B.1.1.529.2.86.1.1.16.1.7.2.1",

"PD": "B.1.1.529.2.86.1.1.11.1.1.1.3.8.1.4",

"PE": "B.1.1.529.2.86.1.1.11.1.3.1.1.10.2.1",

"PF": "B.1.1.529.2.86.1.1.11.1.1.1.3.8.1.6",

"PG": "B.1.1.529.2.86.1.1.11.1.3.3.5",

"PH": "B.1.1.529.2.86.1.1.11.1.3.1.1.10.1.6",

"PJ": "B.1.1.529.2.86.1.1.11.1.3.1.1.10.1.7",

"PK": "B.1.1.529.2.86.1.1.23.1",

"PL": "B.1.1.529.2. ''86.1.1.16.1.7.1.10",

"PM": "B.1.1.529.2.86.1.1.11.1.3.2.6",

"PN": "XDV.1.7.1",

"PP": "B.1.1.529.2.86.1.1.11.1.1.1.3.8.1.8",

"PQ": "XDV.1.5.1.1.8.1",

"PR": "B.1.1.529.2.86.1.1.11.1.1.1.3.8.1.5",

"PS": "B.1.1.529.2.86.1.1.49.1.1.1.1.1.1.1",

"PT": "XEC.4.1.1",

....."PU": "XEC.4.1.3",

"PV": "B.1.1.529.2.86.1.1.16.1.7.7.1",

"PW": "B.1.1.529.2.86.1.1.16.1.7.9.2",

"PY": "B.1.1.529.2.86.1.1.16.1.7.9.1",

"PZ": "B.1.1.529.2.86.1.1.16.1.7.1.4",

"QA": "B.1.1.529.2.86.1.1.16.1.7.1.3",

"QB": "B.1.1.529.2.86.1.1.16.1.7.1.13",

"QC": "B.1.1.529.2.86.1.1.16.1.7.6.2",

"QD": "B.1.1.529.2.86.1.1.16.1.7.1.8",

"QE": "B.1.1.529.2.86.1.1.11.1.1.1.3.8.1.16",

"QF": "XFG.3.4.1",

"QG": "XEC.4.1.2",

"QH": "B.1.1.529.2.86.1.1.11.1.1.1.3.8.1.7",

"QJ": "B.1.1.529.2.86.1.1.16.1.7.1.6",

"QK": "XFG.3.1.2",

"QL": "XDV.1.5.1.1.1.1",

"QM": "B.1.1.529.2.86.1.1.11.1.1.1.3.8.1.2.1.2.1",

"QN": "XDV.1.5.1.1.5.1",

"QP": "B.1.1.529.2.86.1.1.11.1.3.1.1.10.2.2",

"QQ": "XFG.17.2.1",

"QR": "B.1.1.529.2.86.1.1.16.1.7.7.2",

"QS": "XFG.3.4.3",

"QT": "XFG.3.4.2",

"QU": "B.1.1.529.2.86.1.1.11.1.1.1.3.8.1.1.3.1.2",

"QV": "B.1.1.529.2.86.1.1.16.1.7.2.2",

"QW": "XFG.5.4.1",

"QY": "XFG.4.1.3",

"QZ": "XFG.7.1.1",

"RA": "XFJ.3.1.1",

"RB": "XFG.23.1.1",

"RC": "XDV.1.5.1.1.8.1.2.8.1",

"RD": "B.1.1.529.3.2.1",

"RE": "B.1.1.529.3.2.2",

"RF": "B.1.1.529.2.86.1.1.16.1.7.9.1.1.1.1",

"RG": "B.1.1.529.2.86.1.1.11.1.1.1.3.8.1.2.1.2.2",

"RH": "XDV.1.5.1.1.8.1.10.1.4",

"RJ": "XDV.1.5.1.1.8.1.4.6.2",

"RK": "XDV.1.5.1.1.8.1.17.7.2",

"RL": "XFG.14.1.2",

"RM": "XFG.5.2.5",

"RN": "XFG.3.4.6",

"RP": "XFG.1.1.1",

"RQ": "XDV.1.5.1.1.8.1.2.5.2",

"RR": "XDV.1.5.1.1.8.1.14.3.1",

"RS": "B.1.1.529.3.2.2.1.1.1",

"RT": "B.1.1.529.3.2.2.2.2.4",

"RU": "B.1.1.529.3.2.2.2.2.2",

"RV": "XFG.23.1.3",

Tähän asti käytetty kirjainten 2 kombinaatiota nyt .

.....Alkurekominanttien kombinaationimiä X ja toinen kirjan

"XA": ["B.1.1.7","B.1.177"],

"XB": ["B.1.634","B.1.631"],

"XC": ["AY.29","B.1.1.7"],

"XD": ["B.1.617.2*","BA.1*"],

"XE": ["BA.1*","BA.2*"],

"XF": ["B.1.617.2*","BA.1*"],

"XG": ["BA.1*","BA.2*"],

"XH": ["BA.1*","BA.2*"],

"XJ": ["BA.1*","BA.2*"],

"XK": ["BA.1*","BA.2*"],

"XL": ["BA.1*","BA.2*"],

"XM": ["BA.1.1*","BA.2*"],

"XN": ["BA.1*","BA.2*"],

"XP": ["BA.1.1*","BA.2*"],

"XQ": ["BA.1.1*","BA.2*"],

"XR": ["BA.1.1*","BA.2*"],

"XS": ["B.1.617.2*","BA.1.1*"],

"XT": ["BA.2*","BA.1*"],

"XU": ["BA.1*","BA.2*"],

"XV": ["BA.1*","BA.2*"],

"XW": ["BA.1*","BA.2*"],

"XY": ["BA.1*","BA.2*"],

"XZ": ["BA.2*","BA.1*

https://gisaid.org/sars-cov-2-phylogenetics/global/

,Sitten tarvitaan rekombinanttien nimeämiseen kolme kirjainta X + 2. Nämä kopsasin Githubista toiseen kohtaan.

"XAA": ["BA.1*","BA.2*"],

"XAB": ["BA.1*","BA.2*"],

Koetan sittenkin koota tähän kolminumeroiset rekombit loppupään luetteloa

"XDD": ["EG.5.1.1","JN.1","EG.5.1.1"],
    "XDE": ["GW.5.1","FL.13.4"],
    "XDF": ["XBB*","EG.5.1.3"],
    "XDG": ["FL.37","EG.5.2.4"],
    "XDH": ["BN.1.2.8","XBB.1.9.1"],
    "XDJ": ["XBB.1.16.6","HK.3.1"],
    "XDK": ["XBB.1.16.11","JN.1.1.1"],
    "XDL": ["EG.5.1.1","XBB*"],
    "XDM": ["XDA","GW.5","XDA"],
    "XDN": ["JN.1.1","JD.1*"],
    "XDP": ["JN.1.4","FL.15"],
    "XDQ": ["BA.2.86.1","FL.15.1.1"],
    "XDR": ["JD.1.1.1","JN.1.1"],
    "XDS": ["EG.5.1.3","JN.3.2.1","EG.5.1.3"],
    "XDT": ["BA.2.86.4","GK.1"],
    "XDU": ["XBB.1.16","BA.2.86.1"],
    "XDV": ["XDE","JN.1","XDE","JN.1"],
    "XDW": ["JN.2","XDA"],
    "XDY": ["LB.1.2.1","KP.3.2"],
    "XDZ": ["JG.3","JN.1.1.10"],
    "XEA": ["JN.1.63.1","EG.5"],
    "XEB": ["FL.15","JN.1.4","FL.15"],
    "XEC": ["KS.1.1","KP.3.3"],
    "XED": ["JN.1.4","LF.1.1.1"],
    "XEE": ["KP.2.3.7", "JN.1"],
    "XEF": ["LB.1.4", "KP.3"],
    "XEG": ["JN.3.2.1","GJ.1.2","JN.3.2.1","GJ.1.2"],
    "XEH": ["KP.1.1.3","KP.3"],
    "XEJ": ["JN.1", "LF.1.1.1"],
    "XEK": ["KP.2.3","XEC"],
    "XEL": ["KS.1.1.2","JN.1"],
    "XEM": ["KS.1","KP.3.3.1"],
    "XEN": ["KP.1.1.6","JN.1.11.1"],
    "XEP": ["KP.3.1.1","NP.2"],
    "XEQ": ["KS.1.1.2","KP.3"],
    "XER": ["KS.2","LF.7"],
    "XES": ["KP.2.3","KP.3.3"],
    "XET": ["KP.1.1.1","KP.3.1.1"],
    "XEU": ["XEK","XEC.8"]
,(Lisään XEU jälkeen tulleet 20.2. 2026.

"XEV": ["KP.3.1.1","XEC.18"],

"XEW": ["KP.3.1.1","XEC.8"],

"XEY": ["MC.29","XEC"],

"XEZ": ["MC.6","XEC"],

"XFA": ["MC.1.1.1","XEC.4.1"],

"XFB": ["MC.24","XDY.1.1","MC.24"],

"XFC": ["LP.8.1.1","LF.7","LP.8.1.1"],

"XFD": ["MC.36.1","XEC"],

"XFE": ["MC.37","XEC.19"],

"XFF": ["LB.1.3","MZ.1"],

"XFG": ["LF.7","LP.8.1.2","LF.7"],

"XFH": ["LF.7.1.13","XEF","LF.7.1.13"],

"XFJ": ["LS.2.1.1","LF.7.2","LS.2.1.1","LF.7.2"],

"XFK": ["KP.3.1.1","XEC.5"],

"XFL": ["XEU","XEC.18"],

"XFM": ["LF.7.6.2","LS.2.1.1"],

"XFN": ["XEC.25.1","LF.7","XEC.25.1"],

"XFP": ["LS.2.1.1","LF.7","LS.2.1.1"],

"XFQ": ["LF.7.1.10","XFG.3.1"],

"XFR": ["LF.7.3","LB.1.11.1"],

"XFS": ["LF.7.1","LP.8.1.9"],

"XFT": ["LF.7.7.2","LP.8.1.1"],

"XFU": ["LF.7.6.2","PG.3.1"],

"XFV": ["LP.8.1","XFG.3.3.1"],

"XFW": ["XDY.3","LF.7","XDY.3"],

"XFY": ["XFG.5.1","NB.1.8.1"],

"XFZ": ["XFC.3","PG.3.2"],

"XGA": ["XFJ.4.1","PY.1","XFG.6.2"],

"XGB": ["NW.1.7","QS.1"],

"XGC": ["PY.2","XFG.4"],

"XGD": ["XFJ.4","XFJ.3.1.3"],

"XGE": ["XFG.2","XFG.14.1"],

"XGF": ["XFG.3.13","XFG.14.1"],

"XGG": ["PY.1","XFG.21"],

"XGH": ["QY.3","PY.1.4","QY.3"],

"XGJ": ["XFG.10","XFG.17.2.1"],

"XGK": ["XFG.2.12","XFG.17.2.1"],

"XGL": ["XFG.3.1.12","XFG.17.2.1"],

"XGM": ["NY.3.3","LF.7.3","NY.3.3"],

"XGN": ["XFG.3.5.2","RG.3","XFG.3.5.2"],

"XGP": ["NY.3.3","XFG.26"],

"XGQ": ["PP.1.2","XFG.26","PP.1.2"],

"XGR": ["NW.1.7.4","RN.1"],

"XGS": ["XFG","PY.1","XFG"],

"XGT": ["QF.2","PQ.17","QF.2"]

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