I had my "vaccine" back last March or April. It is the Quercetin Plus Exposure To the Virus vaccine, where I simply started taking quercetin plus relatively sloppy protection against the virus itself. I got exposure to whatever coronavirus was out there, and the quercetin prevented any infection that would have shown symptoms. And this exposure leaves me immune--as if there was no coronavirus at all.
Side effects? Hardly any, unless you count potentially lower blood pressure as a side effect. No, not drastically lower blood pressure. But, reducing "You need to start taking medication" blood pressure to "We need to watch it"--or "We need to watch it" to "Your blood pressure is a touch high normal, but within normal range". Or perhaps preventing the need for drugs for a while. Not bad for something I primarily take to immunize myself against coronavirus while waiting for a dangerous vaccine to become mandatory for something that, for me, would be nothing more than a stupid little cold.