According to Dr Kaufman’s research, what is called Covid-19 is simply what is referred to as «exosomes», i.e. biological material that is produced by the cells to fight some form of assault on the human body. For those who would prefer something easier to assimilate, I also suggest an episode of Flashback Friday on Red Ice TV where the host, Henrik Palmgren, among several items, comments on that presentation by Dr Kaufman. The extract starts around 23:00 minutes.