What is aspiration? It is the pulling back of the plunger of a syringe (for 5–10 seconds) prior to injecting a vaccine. Aspiration is meant to ensure that the syringe needle tip is located at the right muscle location (an intramuscular injection), and has not accidentally punctured a blood vessel.
In this video, Danish Professor Niels Høiby discusses aspiration and how the Danish authorities amended their advice in March 2021 to require aspiration when administering vaccines.
Also discussed is the evidence that vaccine complications (in some cases) have been caused by vaccines mistakenly injected into a blood vessel. In other words, the lack of aspiration has caused vaccine complications.
The Professor compares data from Norway (which does not require aspiration) and Denmark (which does require aspiration). Norway has vaccine complications 3 times higher than Denmark. Could aspiration (or lack of it) be a reason for the differences between the two countries?
Many countries, including the US and the UK, do not require aspiration when the COVID vaccines are administered. Should all countries mandate aspiration when injecting COVID vaccines? (The video concludes with an emphatic 'yes'.)