It seems pretty clear from your comment you don't know what you're talking about.
CAR-T is not a front-line therapy. By the time you might possibly get to this therapy as a patient, you've had multiple failed attempts at other treatments. So, there is so much more than a simple blood test to make that determination. So much more!
In fact, it's a therapy that is incredibly complex and expensive (approximately $500,000) and is performed by only a few centers around the country. By the time a patient gets to CAR-T treatment, they've had multiple failed treatments and have been exposed to the best screening and analysis that modern medicine can offer.
A "simple/cheap blood test with an annual physical" for a rare disease and as a screening mechanism for the use of an incredibly complex treatment is just plain foolish beyond understanding.
Don't mislead us.
Icclearly, don’t be stupid.
The standard Complete Blood Count test include the absolute lymphocyte count (ALC). Take a look at yours. I just looked at my CBCs from my normal annual physical and my wife’s, and it’s right there. I have them going back years.
It is a very basic part of a normal basic routine blood test for everyone.
More on the Complete Blood Count test:
It’s pretty clear you don’t know what you are talking about.
Icclearly, this study was meant for people already taking, or expecting to take, CAR-T therapy.
Rather than wait six months and see a progression, they can start a different therapy at 15 days, thanks to the results of a cheap blood test that everyone already gets.