Please understand that every study that shows spike toxicity is another warning that you do not want this stuff generated by your own cells.
Walter is horrified because he has seen a danger to children that the "virologists" and drug regulators completely missed.
EPCs = Endothelial progenitor cells
From an infection point of view children would have very limited exposure to spike, because their T-cell response is so strong.
This is bypassed by mRNA-based therapies.