In many ways, the need for consent is important and good. (And I come across many issues still extant day by day. [*]) But it has been held that holding out your arm for a blood draw or BP measurement is itself consenting. Though the full set of circumstances needs to be considered.With the ammount of misfo flowing about they're likely having to cover their backs and behaving ethically and above board. - also if folk with weakened immune systems due to other illnesses or medication, would need screening . Not quite black & white but a graded scale of risk/benefit attached with the vaccine.
COVID-19 Vaccination Considerations for Persons with Underlying Medica
If you have an underlying medical condition, this can help you make an informed decision about getting a COVID-19 vaccination.www.cdc.gov
Even when I worked in a hospital consent needs to given to cuff a patient to take their blood pressure, and can't administer a medication without consent either - its not like a pet where you put their pill in food to fool em.
[*] Some of the people I am in contact with wish to expressly refuse certain blood tests. For example, and I am not expecting anyone to follow this, a low TSH result often ends up with a reduction in medicine dose. But that is an indirect and test they do not do the thyroid hormone blood tests FT4 and FT3 which are direct measurement. Hence some actually even write that their consent is for blood to be taken and a list of tests done but expressly NOT TSH unless FT4 and FT3 also done. Yet doctors and labs continue to ignore this, do TSH only, and then receive allegations they failed to request and get consent.