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7:00 p.m. People who receive Sinovac Biotech vaccines are excluded from Singapore's count of total COVID-19 immunizations, officials in the city-state say, amid heightened concern over the delta variant.

"We don't really have a medical or scientific basis or have the data now to establish how effective Sinovac is in terms of infection and severe illnesses on delta," Health Minister Ong Ye Kung told reporters, according to Reuters.

The national vaccination program currently uses only the Moderna and Pfizer-BioNTech shots, though the authorities have allowed Sinovac to be administered by private clinics under a special access system.