RE:RE:RE:RE:This is why SONA is differentthe differentiation is not at all relevant in respect of an ANTIGEN TEST for MASS SCREENING so no need to confuse the issue. You might not want crossover if you were looking for Antibodies in the patients blood at a later date so see who had been infected by what in the PAST but that has NO RELEVANCE WHATSOVER to what the SONA ANTIGEN TEST is doing otherwise where ro you think they get their 96.7% SENSITIVITY from.