A variant of a LAV virus, designated LAVELI and capable of causing AIDS. The cDNA and antigens of the LAVELI virus can be used for the diagnosis of AIDS and pre-AIDS.

 
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< Transgenic mammal carrying ganp gene transferred thereinto and utilization thereof

< Temperature-sensitive and cold-adapted human parainfluenza virus type 2 (HPIV-2) and vaccines based on such virus

> Gene transfer method

> Cell-scaffold composition containing five layers
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