Please see FHIR-37722

1) I believe this should be "Must Support" and not "Must Have" (required). I know it has been required for a long time as inherited from Argonaut, but the defintion then was "a flag to indicate whether the vaccine was reported by patient rather than directly administered". A flag for that makes sense. The current (FHIR R4.0.0) makes no sense. I did a brief survey to discover that most implementations simply hardcode this field to a DAR of "unknown". Please see my suggestions for the base resource in  FHIR-37722

2) In the meantime, if we don't agree with #1 and/or until the base Resource definition is changed - we need to correct the text preamble. By moving, 

  " a flag to indicate whether the vaccine was reported by someone other than the person who administered the vaccine.

from

under .... Must Support

to

Under "Must Have"

3) Given that our preamble text defintion is different than the base resource definition already, can we change out current text defintion:

From:

"a flag to indicate whether the vaccine was reported by someone other than the person who administered the vaccine."

to

"A flag to indicate whether the vaccine was reported by patient or caregiver"

Lastly, what does a Yes or No answer mean when in response to

"a flag to indicate whether the vaccine was reported by someone other than the person who administered the vaccine."

vs

"An indication that the content of the record is based on information from the person who administered the vaccine. This reflects the context under which the data was originally recorded."