I do not know for sure but I do not think they have any way to test your blood for vaccination at this time.
But I remember seeing a story about them wanting to be able to do so related to international travel.
Grandpa Drudge has some good posts on the tests.
Here’s one:
https://freerepublic.com/focus/chat/3996990/posts?page=14#14
~Easy
Harvard Study Explodes Myths About ‘Vaccines’ Stopping the Spread –
But It’s Even Worse Than That
https://t.me/RealGenFlynn/1559
…
A Harvard study of 68 nations and 2,947 counties in the United States
published in the European Journal of Epidemiology is shattering the
argument that the mRNA therapeutic drugs being marketed as “vaccines”
do anything significantly to stop the spread of Covid-19.
It’s even worse than that. As Becker News suggested in September,
there is a positive correlation between a nation’s vaccination levels and
the “case” rates being reported. The scientific findings are a crushing
blow to the argument that the vaccines have a “public health” purpose
and that vaccine mandates are justified.
The Harvard researcher who co-authored the study, S. V. Subramanian
of the Harvard Center for Population and Development Studies, teamed
up with Canadian researcher Akhil Kumar to perform the research.
Their “bombshell” findings? Read them and weep: …
~~~~~~~
(See the Becker News link)
~Easy