I know of two cases who seem to have blood clots after the shots, took several months to manifest. Both had per-existing kidney problems.

A quick theory I came up with is that, it's possible the shots ruin the blood like shown here, but a healthy person will filter out some of it and create new cells, it will slowly exhaust the body but at least in the start they do not show symptoms. It will sort of make you age faster as you are being used up constantly to filter your blood.

People with kidney problems seem to be unable to process blood cells as quickly and thus they create more clots, as usual the family members of those with kidney and clot problems cannot make any connection, their answers are always that: they took the "vaccine" months ago, it cannot possibly have anything related to clots, can it!!