9 yo DD started sniffling and coughing a bit on 13/12. She had a strong positive on an LFT the next morning, followed by a positive PCR. The snotty nose and mild cough continued for another few days, but otherwise she was fine and full of beans. On 22/12, when the isolation time was reduced we did another LFT which was negative, as was the next day. We’ve been out and about since then, but no prolonged mixing. This morning DH tested positive on an LFT. This evening DD has been coughing lots, is a bit wheezy (she’s mildly asthmatic) and is complaining about feeling hot and cold at the same time. Is it possible to have been reinfected so quickly? Or is it lingering effects of the original infection, despite her having been fine and symptom free for a week? Has anyone else relapsed like this?