If you read the FDA statement they only revoked two of the mAb Regeneron and Eli Lily there are still 2 more that have EUAs thise two have effectiveness against omicron. In addition the FDA statement also allows the use of the two who lost their EUAs when the variant being treated is confirmed to be one they are effective with under compassionate use or better known as right to try law. Those are decided on a case by case basis. Eli Lily and Regeneron both confirm that their mAb have near zero effectiveness against omicron both have done in vitro testing to confirm that. Bulk use of these two without gene sequencing the variant to prove it’s Delta or lambda or gamma is really all that changed. There is no medical sense in giving mAb that the manufacturers themselves say are ineffective to people with omicron better to use the two mAb that do have effectiveness or antivirals and steroids.
What??!! Are you trying to confuse FReepers with actual, pertinent details?
Ok. /s ;-)
I would add that on another thread it was noted that serious Delta can be diagnosed as a LRT (Lower Respiratory Tract) disease*, going after cell receptors in the lungs, while Omicron is primarily a URT (Upper Respiratory Tract) disease. Among other clinical diagnoses. So, it is NOT as if samples have to be sent out to be sequenced to make the diagnosis.
I wish I had the capability to post a GIF of Star Trek's Mr. Worf telling a half-mad Klingon comrade "You fight the wrong battles." And I wouldn't even shoot any of the half-mad 30 seconds later. ;-)