From the article idiot.
You can't be this stupid.
“With an ultimate goal of better understanding disease pathways, gain-of-function studies aim to increase the ability of infectious agents to cause disease by enhancing its pathogenicity or by increasing its transmissibility.”
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Apparently, you have a problem with reading comprehension.
I will post it again.
Paul asked, "You take an animal virus and you increase it's transmissibility to humans, you're saying that's not gain of function?"
Facui replied, "That's correct..."
Maybe you need to provide a link to the "article" and quote the ENTIRE paragraph to get proper context.