If I remember correctly the latest study was ended at about 280 days of spike in the body. However, according to Drs. Kory and Marik, the mRNA vax is reactivated in the body with every new jab. And if you happen to be unlucky in the placement of the jab and it enters your blood stream, the spike will travel to every cell in the body. And because the vax has no off switch to stop producing spike, the spike essentially becomes immortal and will last for God knows how long. Then it becomes a battle between clearing the spike and the cells that continue to live on to manufacture new spike. For some people I think long Covid might end up being forever Covid. Happy to be among those who are unvaxed.