My son had covid last month. He thought he had already had it without much symptoms because he was around enough people with covid for that conclusion to be reasonable.
Since he thought he'd had it, he left the early treatment meds several hours away. We were figuring out what he could substitute until we could get them to him when we happened on a possible factor for why he caught it this time. Turns out most of the foods naturally higher in querticin were foods he usually ate often but hadn't eaten at all in a few weeks before getting sick. And he had skimped on his walks outside, the weather had been cloudy, and he'd missed some sleep recently.
It probably wasn't any one thing but a combination of some or all lowering his resistance. A heavier viral load or more infectious variant might also be a factor.
Since he thought he'd had it, he left the early treatment meds several hours away. We were figuring out what he could substitute until we could get them to him when we happened on a possible factor for why he caught it this time. Turns out most of the foods naturally higher in querticin were foods he usually ate often but hadn't eaten at all in a few weeks before getting sick. And he had skimped on his walks outside, the weather had been cloudy, and he'd missed some sleep recently.
It probably wasn't any one thing but a combination of some or all lowering his resistance. A heavier viral load or more infectious variant might also be a factor.