I agree that there is a connection. After my first COVID shot I developed little scabs all over my arm and leg. No treatment would make them go away. I got sciatica a few months after the COVID booster. When no treatment helped, an MRI was ordered and my lymphoma was discovered. I told everyone that I suspect the vaccine but I got brushed off on that idea as if I'm some antivac nut. I was healthy before the shots. Then my oncologist tells me the scabs and the sciatica are symptoms of the cancer. So now what can I think? I know the docs will tend to say it's all a coincidence, yet I hear anecdotal stories everywhere about the vaccine causing problems. This shouldn't be ignored. And I won't be getting any COVID shots in the future.

Yes. I just read this MDPI article https://www.mdpi.com/1648-9144/59/1/157

Non-Hodgkin Lymphoma Developed Shortly after mRNA COVID-19 Vaccination: Report of a Case and Review of the Literature

https://www.mdpi.com/1648-9144/59/1/157

Not that I'm aware of, none that I've heard of.