Your response is very well supported! Claims linking COVID-19 vaccines to cancer have absolutely no ground to stand on and have been repeatedly debunked by credible medical and scientific organizations. The American Cancer Society and factcheck.org both confirm that there is no evidence the vaccines cause, worsen, or trigger cancer. As you pointed out, the rumors often stem from a misinterpretation of early mRNA research in mice, which is unrelated to the approved COVID-19 vaccines.