Some interesting news came out recently that might help shape and define the epidemic spread. This is the so-called antibody test that research scientists have been working on, and is described here in
this article.
Essentially, the antibody test would be a quick procedure from a pinprick blood sample, and be able to tell you if you've ever had the SARS-CoV-2 virus by detecting the presence of the antibody for that pathogen. Test sites could perform up to several thousand tests per day if fully scaled up. It's apparently quite accurate and precise. This new antibody test was posted on March 18, and is already being used in New York City to better understand how quickly the antibodies are developed as described in
this more detailed article.
After reading about this a couple days ago, I starting thinking about how it might be used, and what might be the benefits and implications. For starters, it would help identify those who already had the disease, and in essence are immune to acquiring it and spreading any further. It could also determine those who are active, but asymptomatic. Not sure how that would be implemented, but would be the subject of another thread after the test becomes available... This
SCMP article claims that classified Chinese data showed that nearly a third of the people who contracted the virus, were asymptomatic and thus "silent carriers". If the research being done in New York finds out that antibodies kick-in during some short period of time (for example 3-4 days), then those who were exposed could be quickly tested to see whether or not they need a full 14 day quarantine. This could be helpful for critical medical care staff and others that need to be back in action. Or possibly, something you have to do before boarding a plane, or part of the immigration/customs process. Who knows.
The articles talk about this being able to scale up pretty quickly. I also imagine that it would be much less expensive, and very easy to administer. Sort of like getting a blood sugar test. One pinprick, blood drop goes into a vial, shake it, wait a few minutes, and see what color it comes out to be. You might still have to get a PCR test, but that would only show results if you're actively shedding the virus - since that is an antigen test. The antibody test could be distributed far and wide to remote clinics, and other places lacking sophisticated lab facilities. This might help places like Indonesia (and other countries) that are facing challenges with the PCR test.