11. When can and should screening be administered?

*When can and should screening be administered?*

**The more often the better** \n

No – this will increase the false positive rate. Frequency depends on the disease.

*When can and should screening be administered?*

**The earlier the better** \n

No – disease prevalence in the target group should be high, which might not be the case for young persons

*When can and should screening be administered?*

**Can be before birth**

Yes – examples are testing for genetic diseases, down syndrome, congenital abnormalities or neural tube defects

*When can and should screening be administered?*

**Better for very old people as they have higher disease prevalence**

No – if life expectancy is short there is little gain in long term preventive measures