Is this about shedding. I find it a bit confusing.

I thought it was transmission of the virus, this is as predict, the vexed would be silent spreaders. They seeded this story very early in the media as a "concern", like a false reservation put the programs were rammed through either way - of course this as most things was missed by the majority and even when you tell them they believe you are nuts. Such is the depth of the dark spell most of the world appears to endure.