antibodies

Maybe the operation is a success, but your body develops antibodies to sperm leading to being unable to conceive.

Even if you drop small molecules and focus on antibodies, it's not like it's all that easier.

Society develops antibodies for everything, including novelties in the later century like propaganda and media mass control, advertisement and even TV.

Furthermore, since the body does produce antibodies to HIV, these modified T cells may even be able to fight off the HIV.

Because these drugs are mostly monoclonal antibodies, you have to actually develop your own.

Unfortunately monoclonal antibodies are also some of the most promising drugs currently available.

Why not just use biology (eg antibodies) to direct the drug delivery?

Contrary to popular belief, urine contains antibodies which heal any health issues.

I feel it's more worthwhile than pumping billions more into failed antibodies against beta amyloid, as seems to be the trend nowadays.

I assume they are injecting you with a protein so the body produces antibodies.

Human biological response is sufficiently well understood to permit the design of antibodies (which are grown in fermenters) that treat the symptoms of disease (RA, for example).

Could the antibodies/immune response cause arthritis?

Yes it is, and insulin is hard, but antibodies are even harder, mostly to do with the manufacturing platform "CHO".

We can test for specific ones, but "very high antibodies" could describe any number of different test results, some of which would clear up on their own in time.

Wikipedia[1] is full of jargon, but one caption says "Monoclonal antibodies can be grown in unlimited quantities in the bottles shown in this picture".

"Antibodies" is my favorite: a story about what might happen when P = NP, with a hard AI singularity.

Antibodies are just the tip of the protein-iceberg.