Reuters reported that Chief Cabinet Secretary Katsunobu Kato told reporters that 91 infections were documented in the Kanto area of eastern Japan and two other cases were discovered at airports.
"It may be more contagious than conventional strains, and if it continues to spread domestically, it could lead to a rapid rise in cases," Kato said.
The variant has a mutation on the spike protein that could lower the efficacy of vaccines.
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