Andrey Medvedev, 20, and Alexander Grunenko, 15, met the fearsome beast when they were collecting wild garlic in Kemerovo region.
Four children among those hit by the infection which has spread from a beast slaughtered this year.
Unique pictures taken this month show the Sailugem bear, proving both that this species was not mythical - and has survived - in the Altai Mountains.
Beast kills trekker's dog, but exhausted Andrey Ilyushits, 43, survived clinging to branches in Kemerovo region.
Rescuers save Natalya Pasternak, 55, who is now fighting for her life.
Family of predators terrorise summer camp in heart of Russia’s coldest region - with 83 year old hunter standing guard.
They ran over bear 8 times with Pajero, then kicked it, but angry animal escaped and tried to kill them.
A couple cowered in their banya - sauna - watching the hungry creature eat their dinner.
'Aggressive' animal surprised two hunters in daylight attack, mauling one to death.