The Pertinent Negative.Collignon was saying that Rona could also be transmitted through touching contaminated surfaces rather than predominant aerosol. At that time it was thought to be predominantly droplets - basically same transmission as influenza and other respiratory illnesses.
Even now places undergo “deep clean” if a Covid outbreak occurred.
And along with mask mandates and social distancing, these 3 policies really only mitigate the droplet theory. If aerosol only, then who could possibly think that hotel quarantine is a viable quarantine method?
The HongKong SARS apartment building superspreader event could only have been an aerosol event because patient zero was not living on the top floor. And increasingly influenza is thought to have aerosol transmission as well.
Science is about being skeptical rather than blindly/dutifully following the consensus - which is what I believe Collignon was doing.
Not sure how true but did read ages ago that they thought that SARS started when someone with the infection sneezed in a lift. Or maybe it was a movie I saw