Is HHV-6 in pigs the underlying cause of this illness?
"Scientists working to control one of the most widespread and
damaging pig diseases have demonstrated that its causative virus infects
immune cells, evading detection by the host immune system, and
rendering the host more susceptible to infections."
http://www.bbsrc.com/news/food-security/2014/140312-pr-insights-pig-disease.aspx
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http://www.bbsrc.com/news/food-security/2014/140312-pr-insights-pig-disease.aspx

More on HHV-6 and Pigs