[Serological data on hemorrhagic fever with renal syndrome in Southeast Asia].

Using an indirect immunofluorescent test with Hantaan 76-118 and Puumala strains as antigens, antibodies against haemorrhagic fever with renal syndrome viruses were found for the first time in human in Laos and Viet-Nam and confirmed the previously published results in Thailand. These results suggest the existence of an Hantaan-related virus in these countries.