DS tested positive (for the second time) on 6 Jan. He went back to school after negative lateral flows on days 7&8.
He's been identified as a close contact, so did a LF yesterday (negative) and this morning. Today's was clearly negative at half an hour, but I've just gone to bin it and there is a pale line. I'm assuming this is an evaporation line - he can't have covid again so soon can he?