Further research on vaccine strains suitable for developing live vaccines against tick-borne encephalitis. Reactogenic and immunogenic properties of the Malayan virus Langate TP-21. used as a live vaccine against tick-borne encephalitis Il'enko, V.I.; Davidenko, Z.B.; Smorodintsev, A.A. Tr Inst Eksp Med Akad Med Nauk Sssr 9(5): 138-146 1967 https://eurekamag.com/research/024/729/024729923.php