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SARS is a respiratory infection which is caused by 'X' whereas bird flu is caused by 'Y'. Here Xand Yare, respectivelyH5N1 virus and retro virusweH5N1 virus and RNA virusRetro virus and H5N1 virusDNA virus and retro virus​

Answer» TION:weH5N1 VIRUS and RNA virusRetro virus and H5N1 virusDNA virus and RETRO


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