That magnetic field oscillations play a role, definitely. Cosmic rays play into mutations, certainly.
The breakthrough rate seems to be about 25%. Delta wave seems to be more contagious but it doesnt seem to cause people to be as sick, including the unvaccinated. So I'm not sold the vaccines are really helping reduce symptoms. That's certainly what media wants people to believe though.
So far Joe this year has mimicked last year as far as waves. Spring wave was minor but mostly because Fall wave was so massive. Summer wave is ongoing like last year and should start decreasing soon. We shall see if Fall wave compares to last year. The big difference is deaths which could be vaccine related...we shall see.
Vaccines are not impacting the waves from occuring though.