Vietnam has not yet recorded BA.4 and BA.5 sub-variants of Omicron
(VOVWORLD) -Vietnam has not yet recorded two new sub-variants of Omicron, BA.4 and BA.5, the Department of Preventive Medicine said after the World Health Organization announced on Monday it is tracking a few dozen cases of new sub-variants of the highly transmissible Omicron strain of COVID.
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The Department said that according to Vietnam’s recent reports on sequencing the virus that causes COVID-19, up to 98% of cases were infected with BA.2, the rest were Delta, BA.1, BA.2.1, BA.2.2.
BA.2 has the fastest transmission rate, about 10% faster than normal Omicron. Other variants, through tracking information in the world, do not have much difference. Vietnam has reported a clear downward trend in the number of new COVID-19 cases, deaths, hospitalizations and severity, said the Department of Preventive Medicine.