why don't public health agencies and regulators track vaccine efficacy by vaccine type?

because it sure seems like that would be useful public health data

a sincere question:

we have numerous covid vaccines approved.

each has a different formulation and many use entirely different modes of action.

yet, to my knowledge, no public health agency or regulator is providing societal outcomes data broken out by vaccine brand.

why?

this seems like it would be incredibly useful information.

with such variety in type, variety in outcomes seems quite plausible to the point of being a near certainty.

so why is no one studying this?

if some work better than others or have lower incidence of adverse events, would it not be the literal definition of "serving the public health interest" to determine this and share the information?

it’s not like the data is not out there or could not be collected. if we know you are vaccinated, we also know with what. it’s in your medical records.

i struggle to even conceive of an argument for not doing so or why such data ought not be collected and widely disseminated.

given huge ongoing government purchases, one would think that THEY themselves would be anxious to know.

and yet this practice seems entirely absent.

how can any "public health agency" claim actual service to the public health while abrogating this basic duty to generate the data that allows people to make the best health choices?

how is literally no one even asking for, much less demanding this?

can anyone even provide a non-sinister/non-crony-corporatist theory?

because i am flat out struggling to think of one. given all the other data they are collecting like an OCD ant farm, why are they not collecting the data that would actually be useful?