Dr John Campbell made a good point recently. The vaccine is supposed to be intramuscular but nobody outside of South Africa is aspirating to know whether they hit a vein. If it goes into the blood stream that might explain the myocarditis and other vaccine injuries that are hard to explain given the supposedly local impact of the vaccines. Not a health care practitioner myself so it’s hard to know if this is a realistic concern. I know the nurse didn’t aspirate when I got my jabs. According to the WHO it’s controversial. Seems prudent to me.
I asked about this specifically in Germany and they told me that they do not aspirate any more.
According to the German vaccine advisory body, it’s done to avoid patient discomfort.
This was originally discussed in Denmark in relation to the AZ vaccine, where they mandated aspiration. In the end it didn’t matter, as they forbade AZ completely (and deservedly)