The number of hospitalisations did not exceed 2,000 during the peak of the pandemic in late 2020, but began to rise in late winter during the second wave of infections.
Ukrainian health minister Maksym Stepanov this week said the shipments of the Sinovac vaccine would likely be delayed, as first reported by Reuters last month.
In December, Ukraine signed a contract to buy around 1.9 million doses of the Sinovac vaccine.
Separately, Health Minister Maksym Stepanov said Ukraine wanted to resume production of its own vaccine candidate and a clinical trial was being prepared, without giving details.