[vobios]

Why is that not possible? A standard home pregnancy test is small, takes a few minutes, and is fairly reliable at detecting human chorionic gonadotropin (hCG). If you can find an antibody specific for a particular infection, you can make a similar test. It's mostly useless, but certainly possible.

[richardbrevig]

If you're asking about the competition I was in, with the "miracle device," I forgot to mention that they gave multiple examples of what it could detect. Sore throat, ear infection, etc. The pregnancy test you mention is determined by a single use hormone detection. It's a chemical reaction dependent on one specific hormone being detected, not multiple hormones or multiple antibodies. For comparison, a urinalysis strip has multiple markings on it each for a different test. And they're not reusable. Whereas this just "magically" knew that you had Streptococcus pneumoniae or Haemophilus influenzae present--no demo, no explanation of how.