Continual vigilance is required to stay on top of viruses.
Combined viruses cause more deadly disease in pigs, researchers discover
WEST LAFAYETTE, Ind. - A pig virus that exists worldwide has become more dangerous as the virus has mutated and then combined with other pathogens, according to Purdue University researchers.
It's not known why a virus that has been known to infect swine for almost 40 years in North America suddenly started causing disease in young pigs in 1991 and then began mutating into more deadly forms. Evidence from research being conducted at the Indiana Animal Disease Diagnostic Laboratory on the Purdue campus has indicated that...(complete article here).
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