I’ve been tested three times plus one antibody test. I’ve never had the nasopharyngeal (“brain tickler swab”), just one rapid nose swan, one self-administered nose swab, and one self-administered oral swab. My six- and four- year-old daughters had to get the full brain tickler. The younger one barely flinched. The older one needed to be restrained, poor girl. All tests negative. (Latest results just came in a few minutes ago for the older daughter.)
I also had an antibody year back in the summer. Also negative.