You ( the virus ) were using the brainpower of Dave and his
unhappy bosses ( who had caught you in all of Daves sneezing,
for some strange reason Dave's co-workers didn't catch 'you' )
so you formed a telepathic link between Daves brain and the brains of the nine people who had been Daves bosses before he
quit.
What you learned was that the nine were the heads of the
various departments of a production house that made the
special effects and footage for various films being made around the world.
That pleased you as it meant when the nine got changed into dragons there would be a longer period of time before the nine
and other humans figured out the changes in their bodies wasn't
just some spilt makeup cream with glittery scales in it.
Meanwhile you encouraged Dave to visit tourist cities that had
statues of dragons in them,such as London ,England and Versailles ,France,because you ( the virus ) wasn't/ween't actually sure if Dave would come out of this a anthro dragon walking
around on two legs or a four footed beastie with serious
growing pains issues to deal with.
You just didn't know what the actual transformation would be
like once the Trigger started the process and Dave,his nine ex-bosses and any other humans (who were not immune to you the virus ) started transforming.