Even though official Russia was still unsympathetic to his research, [citation needed] Haffkine's Russian colleagues, doctors V. K. Vysokovich and D. K. Zabolotny, visited him in Bombay. During the 1898 cholera outbreak in the Russian Empire, the vaccine called "лимфа Хавкина" ("limfa Havkina", Havkin's lymph) saved thousands of lives across the empire.