The April 30th Police Hospital in District 5 said Wednesday that the patients came to a private clinic for health checks with symptoms including running nose and sore throat.

A medical worker analyzes a new coronavirus infection sample at a laboratory in HCMC, February 2021.

After they were found positive for the novel coronavirus via rapid testing, the clinic sent their samples to the hospital for PCR confirmation tests. Staff at the hospital detected genetic abnormalities in the samples and sent them to HCMC Hospital for Tropical Diseases for gene sequencing. The results on Tuesday afternoon confirmed they were infected with the BA.1 sub-lineage of the Omicron variant.

The three patients are a 35-year-old in Binh Chanh District, a 31-year-old in District 11 and a 48-year-old in Go Vap District.

Local authorities are locating the patients' neighborhoods and taking samples of those that have come into close contact with them for testing.

The three patients have raised Vietnam's number of Omicron infections to 73. The previous 70 cases, including 30 in HCMC, were all foreign arrivals isolated at least three days upon entry.

The Ministry of Health had warned late last year that the risk of Omicron spreading in Vietnam is high and once that happens, it could overload the healthcare system as it has been confirmed to be more contagious than Delta.

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Source: VnExpress