I assume you mean the vaccine.
"Long term effects" here doesn't mean what you think it means....
In the past, long term side effects were still occuring with weeks or few month after the shot. However, the statistical signal may be delayed for years or decades to manifest.
It's very hard to think of a way how anything could cause side effect years down the line. Vaccines do not contain beryllium or asbestos. The mRNA vaccines do not even contain mercury or other heavy metals. Mind you, 'none' means less than a can of tuna. They do not remain in the body for long. None of it.
That's why people aren't too worried, rationally. Long term effects whould have shown already.
If you indeed mean COVID, I agree. There may be late long term effects, because of the diffuse organ damage and persistent infections.
Of course any strong immune stimulation may slightly increase or decrease the risk for derailing or aging the immune system. Which may sooner, e.g. autoimmune disease risk, or later, e.g. lymphoma risk, manifest.
For COVID it's a silly debate, because you will get infected or vaccinated in any case.