Sajid,
The most important thing is to change the mindset of people regarding thalassemia and survival. The days of saying don't bother with them because they have thal are gone. Try to emphasize that with current treatments, thals now live well into adulthood and have useful productive lives, including having careers, marrying and having children. We opened many eyes in Maldives when we talked about these issues and you can do the same with your talk. Things can and will change but it takes some effort to change the way people think. Thal has been a stigma around the world and often thals have felt a need to hide their condition. Parents of thals need hope and they find much hope in seeing that this stigma is vanishing and thals are being accepted, as people realize they will not die by 20 years old.
Don't underestimate the impact your words can have. Giving someone hope is sometimes all that is needed to make a difference in their lives. Belieivng that it is possible is the very big first step many thals and parents of thals need.