BREAKING🔔 A new study from G2P-Japan🇯🇵 is out at bioRxiv @biorxivpreprint. We elucidated the virological characteristics of SARS-CoV-2 KP.2 - a progeny of JN.1. Please RT🔥 1/ biorxiv.org/cgi/content/sh…
Cf. This is KP.2 (aka JN.1.11.1.2). In spike, KP.2 = JN.1 + S:R346T, S:F456L & S:V1104L).
We remember that R346T was observed in BQ.1.1 and XBB lineages, while F456L is a hallmark of EG.5 lineage. 2/
Transmissibility/fitness (Re): molecular phylogenetic-epidemic dynamics modeling led by Jumpei @jampei2 and Kaho showed that the Re of KP.2 is ~1.2-fold greater than that of JN.1. 3/
BREAKING🔔 The 32nd paper from G2P-Japan🇯🇵 is out at Lancet Infectious Diseases @TheLancetInfDis. We show the breadth of antisera induced by XBB.1.5 monovalent vaccine - comparison between infection-naïve and XBB-infected individuals. Please repost🔥 1/ thelancet.com/journals/lanin…
To control SARS-CoV-2 infection, the XBB.1.5 monovalent vaccine is now available. However, we found that natural infection with XBB subvariants, including XBB.1.5, does not efficiently induce humoral immunity against the infecting XBB subvariants, e.g. 2/
These observations raise the possibility that the XBB.1.5 monovalent vaccine may not be able to efficiently induce humoral immunity against emerging SARS-CoV-2 variants, including a variety of XBB subvariants as well as BA.2.86 and JN.1. 3/
BREAKING🔔 The 33rd paper from G2P-Japan🇯🇵 is out at Lancet Infectious Diseases @TheLancetInfDis. We elucidated the virological characteristics of SARS-CoV-2 JN.1 - a progeny of BA.2.86 (#Pirola). Please retweet/repost 1/ thelancet.com/journals/lanin…
This is JN.1 (aka BA.2.86.1.1; in spike, JN.1 = BA.2.86 + S:L455S. We remember that the L455 substitution, S:L455F, was observed in the XBB lineage (e.g., HK.3 and these are known as "FLip" subvariants). 2/
Transmissibility/fitness (Re):
Molecular phylogenetic-epidemic dynamics modeling led by Jumpei @jampei2 and Kaho showed that the Re of JN.1 is apparently greater than that of BA.2.86 and others, suggesting that S:L455S can contribute to the increased fitness of JN.1. 3/
BREAKING🔔 A new study from G2P-Japan🇯🇵 is out at bioRxiv @biorxivpreprint. We elucidated the virological characteristics of SARS-CoV-2 JN.1 - a progeny of BA.2.86 (#Pirola). Please RT🔥 1/ biorxiv.org/content/10.110…
Cf. This is JN.1 (aka BA.2.86.1.1; in spike, JN.1 = BA.2.86 + S:L455S. Importantly, we remember that the L455 substitution, S:L455F, was observed in the XBB lineage (e.g., HK.3 and these are known as "FLip" subvariants). 2/
Transmissibility/fitness (Re):
Molecular phylogenetic-epidemic dynamics modeling led by Jumpei @jampei2 and Kaho showed that the Re of JN.1 is apparently greater than that of BA.2.86 and others, suggesting that S:L455S can contribute to the increased fitness of JN.1. 3/