The S-COV is the mild strain from bats only killing marginals. The L-COV was a morph after entering humans. It is more virulent and may be the one causing collapses and possible Central nervous problems. Or the L-Type was the human modified version of the S-Type.
There were several bizarre looking poses of people on stretchers back when this first started. Many were similar. At first I thought it might just be people in a panic reaching out for help.
But seemed to be more frozen when I saw videos.
Perhaps that is the Neuroinvasive part of this.