“But if you test positive, SARS-CoV-2 is present in your body.”
False. The test picks up all kinds of other fragments. How was the system calibrated when, at the time the test was designed, there was not an isolated sample of covid19 available. Is there one now? Show us the proof.
The genetic code for SARS-CoV-2 was released to the world on January 11th. https://www.cidrap.umn.edu/news-perspective/2020/01/china-releases-genetic-data-new-coronavirus-now-deadly
Samples were isolated from the airway epithelial cells of infected patients in Wuhan China in December 2019 and the new pathogen was sequenced shortly thereafter. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7180649/
The NCBI genome ID is 86693: https://www.ncbi.nlm.nih.gov/genome/?term=86693
How do you create a test that looks for specific genetic sequences when you don’t have a sample of the virus itself? Well, you look at the genetic sequences that distinguish the virus from all others and you design a test to look for them. It’s pretty straightforward.