If you have earned a doctorate you have every right to use it, especially if it is relevant to what you do. I think your implications are distasteful Alegrais.
There has been much inconclusive discussion on the subject but this is the most up to date medical paper I could find. It has been peer-reviewed and all sources seem properly referenced. This paragraph seemed most relevant to our conversation. It was published in 2017 so you may be able to find papers that supersede this one.
Aspiration prior to injection of medication through the IM route remains a part of most guidelines 4, 35, 38– 40. Nursing curricula and guidelines 4, 38, 39 clearly recommend aspiration as an essential step in IM injection technique. Guidelines originating in the UK recommend aspiration prior to IM injection of medications 35, as well as specifically as part of the Z-track technique of administering IM injections. Training curricula for community health workers in Nigeria recommend aspiration prior to IM, SC and intradermal [ID] injections 40.
This seems to be where we were before the Covid 19 vaccines. I can find nowhere that says this has changed. There may be reasons for the change in this instance; speed is probably one. However, this means the current vaccines are being given against previous directives.
We are where we are but it is the possibility of the blood clots that make the vaccination for younger people and children more questionable. No one is saying anything other than that this should be looked into and we should know why they are not moving to aspiration for these groups.