Moscow began distributing the Sputnik V COVID-19 shot via 70 clinics on Saturday to the most exposed groups, marking Russia’s first large-scale vaccination against the disease, the city’s coronavirus task force said.

Axar.az reports citing Reuters that, the Russian-made vaccine will first be made available to doctors and other medical workers, teachers and social workers because they run the highest risk of exposure to the disease.

“You are working at an educational institution and have top-priority for the COVID-19 vaccine, free of charge,” read a phone text message received by one Muscovite, an elementary school teacher, early on Saturday and seen by Reuters.

President Vladimir Putin has ordered a nationwide voluntary vaccination programme to begin next week. He said Russia will have produced 2 million vaccine doses within the next few days.

The head of the Russian Direct Investment Fund (RDIF), Kirill Dmitriev, said in an interview with the BBC on Friday that Russia expects to give the vaccine to about 2 million people this month.