Abstract: The present invention relates to a prophylactic administration method against respiratory viruses, comprising administering interferon-beta to a potential respiratory virus-infected subject, and more specifically, to a method for restraining self-replication infection of respiratory viruses in a subject exposed to potential respiratory virus infection by administering interferon-beta as an active ingredient to respiratory cells through breathing in the manner of direct administration to cells infected with or potentially infected with a respiratory virus.

Abstract: The present invention relates to a human interferon-beta variant with double mutation and a method for improving stability of a human interferon-beta variant and, more specifically, to a human interferon-beta variant including an amino acid sequence having serine substituted for the 17th amino acid cysteine of human interferon-beta and threonine substituted for the 27th amino acid arginine of the human interferon-beta, and a method for improving stability of human interferon-beta R27T variant, the method comprising a step of substituting serine for the 17th amino acid serine in the human interferon-beta R27T variant in which threonine is substituted for the 27th amino acid arginine of human interferon-beta.