The blood samples are used for serology tests, where you find antibodies against viruses. It is also very useful, but your imune system takes time to create those antibodies (up to 4 weeks). Using PCR to detect active viral infection (before you can detect antibodies) is faster, easier and cheaper. If you had a symptomatic person with covid and did serology tests, you would find antibodies in the bloodstream. However, since covid spreads before the symptoms start, if you waited 4+ weeks to diagnose an individual and isolate it from the comunity, it would be a waste of time since that person spent the whole excretion time walking around and spreading covid. So they used PCR instead.
Discussion
exactly
using PCR on a fast spreading virus is literally useless
the whole thing was a fraud, i am wondering why i followed you when you clearly don't see this
But if you detect it in time you can isolate the carrier and stop the spreading! Reducing the spreading is better than doing nothing because there are individuals who are more fragile and could really suffer from the disease
yeah, a bit like jailing everyone who was within 1km of a murder, when you aren't even certain that the perp has had the time to get outside of that boundary
it's not effective to be excessively punitive on people over a FUCKNIG COLD VIRUS
don't waste your time trying to explain why i am wrong because i literally spent 3 days in the typical covid anaphylaxis, i beat that virus and i have barely been as sick as this since, and before, it was the same as ever, something that happens every 5 years or so, big FUCKING DEAL
fuck off with your praise of PCR and lockdowns, you are literally retarded