The only thing it is effective at is making your cells explode. Even going by the accepted narrative, the virus enters mainly your lungs making spike proteins until your body figures something's up and attacks the infected lung cells(sometimes other cells as well). The vaccine enters random(or not so random) cells in your body and produces spike proteins until your body figures something's up and attacks the infected cells. The main difference is in all subsequent exposures. Assuming you still have natural immunity, the virus will only get to infect a few cells before your immune system obliterates it. The vaccine, on the other hand, will always enter the same number of cells because you have no immunity to it. Every single time you will get cell damage on random cells including many important ones. By design.