That is what they told my wife when she had her breast cancer surgery. She specifically asked for blood from people who had not taken the Covid shot. We didn’t. And they told her they had no way of knowing what donors had or had not had the vaccine.
You would have to go to an advanced country to get pure blood. (It wouldn't be the Greatest Country in the World, of course. The Greatest Country in the World is riddled with corruption to the very top.)
You would have to go to a place like Mexico (the country we like to kick around here).
When Del Bigtree needed surgery, he knew that the Greatest Country in the World had so completely fouled its blood supply that he couldn't have the surgery done here. So he did some research and he ended up in Mexico (the country we like to kick around here). Even more interestingly, when he asked doctors here in the Greatest Country in the World if he could have blood from family and friends donated for use in the surgery, he was told that it would take a couple of weeks to have this done, and it would not be completed in time for the surgery. When he asked the doctors in Mexico (the country we like to kick around here) how long it would take to have blood from family and friends prepared for use in surgery in Mexico (the country we like to kick around here), he was told it would take about 48 hours.