What does are you free from all curable diseases mean?

It means are you minimizing the risk of the preventable diseases occured, like chronic disease, infections and cancers?

The occurrence of chronic diseases such as high blood pressure and diabetes can be prevented by eating healthy and by practicing physical activity

The occurrence of cancer can be prevented, with a good hygiene of life, and avoiding any cancerigenic substance and factor.

Infections can be prevented by keeping our environment clean and by washing your hands and body frequently.

of those who start drinking before they're 15 will develop alcohol dependence

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.