Planning a workplace health seminar

Hey everyone! I hope you're all doing well. I was recently contacted by a company that's planning a 'Living Healthy' office health screening and seminar, and they asked me to be the keynote speaker and lead a Q&A session for their employees. One of the main topics they want me to cover is the early signs of lung cancer and when to seek medical attention. It seems like someone at their office was recently diagnosed, and it's really shaken them up.

I'm reaching out to you all because I’d love to get your thoughts on what early signs or symptoms I should emphasize in a setting like this. I don’t want to scare anyone, but I also don’t want to downplay the importance of catching things early.

Any advice or personal stories you can share would be super helpful—thanks so much for helping me navigate this delicate topic!