I was in Orlando when this happened, and our agent at Sanford told us what he knew.
What we were told was that the FO was found to be completely in the clear, having shown a positive on the first test. I assume therefore that the original equipment used was faulty.
I imagine that if the incident had been reported here after the initial findings, the poor guy would have been hung out to dry (sic) even before it had been discovered that he was completely in the clear. The press may have got hold of it and we'd have all been the worse off.
I'm pleased it hasn't appeared here until now, because it would not have been good for the individual concerned, Britannia nor our industry.
What is good, is that an individual has been tested negative, which is a positive! Great news!