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Omicron subvariant's spread threatens to prolong COVID wave

Highly contagious BA.2 becoming dominant in more countries

A boy receives a COVID-19 vaccine in the Philippines. The BA.2 subvariant makes up 98% of recent new infections in the Southeast Asian country.   © Reuters

TOKYO -- A new version of the omicron coronavirus variant is spreading rapidly across the world, and its high transmissibility may be fueling the staying power of COVID-19 in some countries.

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