Then you should ask or demand-before you are going to be injected- that before the fluid is injected into the deltoid muscle of the arm that the one who injects .aspirates first before injecting the fluid [this takes one or two seconds maximally and is perfectly safe]
This has been done since old by all doctors[or nurses] for good reasons. For no good reasons the recommendations has been changed with possible serious complications for the covid-19 vaccinations.
As the CDC is involved in policymaking there is little chance that a doctor would use his own brain “because of fear” and continue with the safer technique of aspirating first and is going to ignore the bureaucrats.
Part of the serious complications which are seen may be connected with this change of injection technique but probably only a huge mishpat [law-case] of patients who had complications] will be able to let organizations rethink their advice.