You have to make up your own mind, and be comfortable with your decision.

That said, I dare say that there are complications associated with almost everything we, including our animals, come in contact with these days.

Tumors from yearly vaccines, tumors from microchips, lung cancer from asbestos, the list goes on and on and on. The best source of Vitamin D is exposure to sunlight. Too much sunlight can cause skin cancer. Medications to control seizure disorders can cause depression and suicidal tendencies. As the saying goes, you pays your money, you take your chances.

I have 6 cats - all with chips - all getting vaccines when due. I've had all of my shots, also. So far we are all fine.