In Moscow, more than 1,000 new cases were recorded on Thursday for the first time since June.
The number of daily new cases started to grow in late August in Russia, which has the fourth largest caseload in the world at 1.12 million cases and nearly 20,000 confirmed deaths.
Officials have repeatedly dismissed speculation of a second lockdown, saying the increase was expected and Russia’s health care infrastructure was prepared for it.
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Russia was the first country in the world to approve a vaccine against the virus last month.
The move elicited criticism from experts worldwide because the shots were tested on a few dozen people. More studies are needed to establish the vaccine’s safety and effectiveness.