Github: AY.3.1 – a new sub-lineage of AY.3 concentrated in Mississippi, USA

AY.3 is the main variant being sequenced weekly in Mississippi (>70% of all recent sequences), most falling within this sub-lineage of AY.3 that is distinguished by the mutations described below (>60% of all recent sequences)....More...

UK: PHE Technical Briefing and Variants of Concern update 18

PHE England have recently published new reports on the SARS-COV-2 variants circulating in Britain: Alpha, Beta, Gamma, Zeta, Eta, B.1.1.318, Theta, Kappa, B.1.617.3, AV.1, C.36.3, Lambda, C.37

SARS-CoV-2 variants of concern and variants under investigation in England

Variants under surveillance
Variant prevalence
Secondary attack rates
SARS-CoV-2 Immunity and Reinfection Evaluation (the SIREN study) cohort monitoring

Part 2: Delta (B.1.617.2) surveillance
Surveillance through genomic data
Delta with K417N (Delta-AY.1)


Investigation of SARS-CoV-2 variants of concern: routine variant data update

Data on individual variants
International Epidemiology
VUI-21FEB-04 (B.1.1.318)
VUI-21APR-03 (B.1.617.3)
VUI-21MAY-01 (AV.1)
VUI-21MAY-02 (C.36.3)
Lambda (C.37, VUI-21JUN-01)



Preprint: Transmission event of Delta coronavirus variant reveals multiple vaccine breakthrough infections

Here we describe a transmission of a Delta variant containing SARS-CoV-2 strain, between family members associated with events surrounding a wedding with 92 attendees, near Houston, Texas....More...

From Alpha to Delta – how Britain won and then lost the fight against coronavirus

After months of being ravaged by the Alpha variant (B.1.1.7) in 2020, Britain seemed to turn a corner in its fight with the coronavirus in early 2021....More...

Russia: New “Moscow” #coronavirus strain is Delta – Московский штамм коронавируса – Дельта

Russian newspapers are still referring to a new “Moscow” strain of Sars-CoV-2, however it seems that the strain may simply be Delta (B.1.617.2)....More...

Canada: 82% Delta vaccine breakthrough in Calgary Hospital #coronavirus outbreak

An outbreak of the Delta coronavirus variant at the Foothills Medical Centre in Calgary has seen 16 patients and six health-care workers tested positive for the variant. ...More...

UK: BMJ letter – “we need an urgent focus on mitigations in schools” for Delta #coronavirus variant

“On the 17 May 2021, the UK government removed the requirement for face coverings in secondary schools in England....More...

UK: one week until B.1.617.2 Delta #coronavirus variant takes off

9th June 2021: If the previous waves of Sars-CoV-2 in the UK are anything to go by, Britain is less than one week away from the B16172 Delta variant exploding into another full-blown national health crisis....More...