Morita C, Matsuura Y, Morikawa S, Kitamura T
Arch Virol. 1985;85(1-2):145-9. doi: 10.1007/BF01317014.
Horizontal transmission of HFRS virus to cagemates occurred from rats inoculated with the virus within 48 hours after birth, but not from those inoculated at 3 weeks of age.