The lateral flow antigen tests answers a binary positive / negative for a specific virus. In this case for SARS CoV2. FAlse positives are possible but unlikely.I read somewhere that sa are now adding positive antigen tests the the total number of cases per day.
Please enlighten me ,I thought an antigen can show a positive for a cov_19 ,but can also pick up any small other cold or flu as long as you have a high viral load?
I think the uk is also doing this?
If this is true our number will allways be up as people will allways have colds etc with positive antigen tests, or does an antigen differentiate what you have?
"The False positive rate varied from <0.1% to 0.3% on all the LDS using PCR negative saliva samples (see Supplementary Table 1). More extensive testing was performed on the Innova LFD, for which we had a sufficient supply of kits available for wider testing at the time. Device specificity was determined through an analysis of 6954. The percentage of false-positives ranged from 0.00 to 0.49%, with an overall specificity of 99.68%. The false-positive rate was centre-dependent (p = 0.014, Fisher’s exact test). These evaluations noted that where there were challenges in interpreting the results when the test result was “weak” (i.e. the test line was very faint)"