FDA is doing something stupid again: They say nobody should check their antibody titres after vaccination because some of the available antibody tests check for nucleocapsid antibodies, and you only develop them if you had the virus. The mRNA vaccines are both against spike protein, so those will give you a negative nucleocapsid antibody test despite being vaccinated.

But both nucleocapsid and spike antibody tests are available. I remember when the nucleocapsid test came out and doctors were so happy they could tell the difference between infection immunity and vaccine immunity. And I just read a story about an immunosuppressed transplant surgeon with a heart transplant, who checked his antibody level (presumably with a spike antibody test) after two mRNA vaccines and found he had a minimal response. He got a third vaccination with J&J and then tested as immunized.

So just because such testing would require a brain cell or two to get the right test, FDA goes for the least common denominator and figures we are all morons, so we should avoid proper medicine because we might get confused.

We're flying electric helicopters on Mars yet you can't turn on your clothes dryer in Texas. That's because scientists are in charge of Mars, and Republicans are in charge of Texas.