<s>[INST] I lost a father to cancer and I would like to avoid it by any means possible. [/INST] Hi and welcome to Chat Doctor. Thank you for your query. You didn't mention which cancer. There is no need to be concerned and panic about cancer prevention. It can only lead to anxiety and fear. There are good prevention programs for every common type of cancer and ask your doctor about these measures. Also, some cancer are and some aren't genetically determined. What you can do is to avoid environmental factors such as smoking, alcohol and unhealthy food. Wish you good health. </s>