Do you know per chance which paper has produced that?
All I recall seeing is PHE estimating 60% - 70% and Neil Ferguson similar.
The Hancock quote took me completely by surprise.
As detailed in the thread the next couple of weeks will actually distort things further with the schools being on half term etc so it'll make it all the more difficult to get that important figure which will ultimately decide on where we go from here.
In any case, it's shuddering to see some of the worst case models still showing waves well into spring 2022. Obviously, there are more hopeful projections than that detailed but they are all relevant at this stage.
Genomic reconstruction of the SARS-CoV-2 epidemic across England from September 2020 to May 2021
View ORCID ProfileHarald S. Vöhringer,
View ORCID ProfileTheo Sanderson, Matthew Sinnott, Nicola De Maio, Thuy Nguyen, Richard Goater, Frank Schwach, Ian Harrison, Joel Hellewell, Cristina Ariani, Sonia Gonçalves, David Jackson, Ian Johnston, Alexander W. Jung, Callum Saint, John Sillitoe, Maria Suciu, Nick Goldman, The Wellcome Sanger Institute Covid-19 Surveillance Team, The COVID-19 Genomics UK (COG-UK) Consortium, Ewan Birney, Sebastian Funk, Erik Volz, Dominic Kwiatkowski, Meera Chand, Inigo Martincorena, Jeffrey C. Barrett,
View ORCID ProfileMoritz Gerstung
https://www.medrxiv.org/content/10.1101/2021.05.22.21257633v1.full-text
Here is what it says about the latest variant - you can read the full report in the link.
There could well be other research out there making other claims.
Rapid rise of B.1.617.2 in April and early May 2021
The B.1.617 lineages, first detected in India in 2020, began to appear in English surveillance samples in March 2021. The frequency of the sublineage B.1.617.2 has rapidly increased since, reaching levels of 41% (761/1851) of surveillance sequences on May 15, 2021 (
Figure 5a, b). This growth derived from a large influx of cases due to travel from India to England and onward transmission from those cases despite mandatory quarantine (at individuals’ homes prior to April 23, in managed quarantine facilities thereafter) and testing (
Public Health England, 2020). B.1.617.2 was subsequently observed in a number of large local clusters, such as in Bolton (
Figure 5b) and has been detected in 128/264 informative LTLAs across most of England by May 8 (
Supplementary Figure 7a, b).
The most recent data indicate a relative growth rate of B.1.617.2 around 37% (growth per 5.1d, CI 1.26-1.49) in excess of that of B.1.1.7 and unlike all other VOCs/VUIs (
Figure 5e, Supplementary Figure 7c). Estimates vary between regions and in hotspots (range 1.07-1.41 for informative regions;
Supplementary Figure 7d), yet the cause and duration of this increased growth are unclear. It is likely that at least three factors have contributed: intrinsic differences in the biology of this variant (transmissibility and/or immune escape), the very high rate of introductions in a short time, and epidemiological factors specific to the communities where it spread most quickly. Thus the long-term growth advantage may change as it circulates more broadly in the population.
The rapid rise of B.1.617.2 contrasts to B.1.617.1, which was introduced at a similar time and into a similar demographic background, but which grew more slowly than B.1.1.7 (
Figure 5b, e). This is also evident in the phylogeographic analysis (based on data as of May 1): The 80 genomes of B.1.617.1 are estimated to derive from 17 introductions (range: 15-31), which is similar to the patterns observed for B.1.525 and B.1.351 with around 3-4 genomes for every introduction (
Figure 5d; Supplementary Figure 8). In contrast, B.1.617.2’s 224 genomes are from fewer, but larger, clades (23 introductions, range 6-40), equating to around 10 genomes for every introduction, indicative of elevated domestic transmission throughout April 2021.
The phylogeny of B.1.617.2, in contrast to other VOCs, consists of several clades, which are likely to have originated in the late summer of 2020 and coexisted since as they are split by long branches (
Supplementary Figure 8) (
Nextstrain team, 2021). This suggests that the growth rate of B.1.617.2 was lower in the past. Even though B.1.617.2 increased to 40% frequency in English surveillance samples throughout April and May 2021, this has been largely offset by the falling number of B.1.1.7 cases. Lastly, it is worth noting that the B.1.617.2 lineage is E484 wildtype, unlike B.1.617.1 and B.1.617.3 which harbour a E484Q mutation which might be functionally similar to E484K. Further surveillance and research is thus needed to fully understand the mechanisms that drive transmission of B.1.617.2.
While the incidence of most VOCs and VUIs in England has been successfully controlled in the early months of 2021 by a combination of national lockdown, genomic surveillance, quarantine of international travelers, vaccination, surge testing in affected areas and preferential test, trace and isolation of cases, the example of B.1.617.2 demonstrates how rapidly the situation can change. Variants currently circulating at low levels may also grow in the future if a propensity to evade prior immunity increases their fitness relative to other variants. Constant genomic surveillance is essential to identify and respond to rapid changes caused by pre-existing and new variants.