That makes sense. I do know of people who have long haul symptoms from the vaccinations themselves. If you read the forums long enough (hours upon hours, like I did) you will certainly see cases like this... But some people also appear to heal from long haul by getting a booster. (Though they often decline again after a few weeks.) So, it's a mystery. But since I am recovered from long haul, and have rid myself of heart palpitations (which I had for a year +), I will not take the risk.