Quoted: â??The change weâ??ve seen is a different kind of change. In fact weâ??ve seen the creation of a new kind of virus through the process of reassortment,â? said Christopher Olsen, a public health professor at the University of Wisconsin-Madison and co-author of the study. â??The viruses weâ??ve seen emerge in pigs are a mixture of the classical swine flu, avian flu and human flu,â? he said. Experts also witnessed the emergence of a new subtype in 1998. â??Weâ??ve not been able to determine any specific reasons for why that began to happen,â? Olsen said.
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