A new subtype of Omicron strain was confirmed in Miyagi Pref. - Possibly the first case in the world
On the 28th, the Ministry of Health, Labor and Welfare announced that they confirmed a new subtype in which two types of genes of the Omicron strain were recombined from a sample of a patient who developed a COVID-19 in Sendai City, Miyagi Prefecture in late March. No similar type has been reported in the world, and the strength of infectivity and the risk of aggravation are unknown at this time.
According to the MHLW, the new subtype is a combination of the conventional type "BA.1" and the subtype "BA.2" of the Omicron strain. The patient is not severely ill and has already been distreated. The patient has no history of overseas travel for 14 days before the onset, and no spread of infection has been confirmed so far.
In Japan, another subtype "XE", which is also a combination of "BA.1" and "BA.2", has been confirmed in the airport quarantine in April. However, the new subtype of Sendai has a different place where the gene was recombined from that of XE.
This article is composed using Google Translate customized exclusively for The Chunichi Shimbun. The translation may have limited accuracy.