Vishnevski’s Liniment, which contains birch tar, was a common treatment for wound infections and burns in the Soviet bloc. However, this was something that individuals used because there was nothing else at hand.
Now, there are things like Fucidin, Polysporin and silver ointment for infected wounds and burns, respectively, that are safer and more effective.
Some people still swear by it, because “tradition” and probably some element of malignant patriotism too.