3D Printing in medicine

No need to wait for real/native blood vessels to grow into implanted/repaired tissue
Allows oxygen/O2 to be supplied immediately to implant which is more likely to survive/grow
Vessels can be customised for the individual organ which is more likely to fit
Less likely to be rejected by recipient than real blood vessels.

## advantage for making medicine

Chemical components of the drug can be customised at molecular level to individual patient
Drug can be customised to deal with patient specific issues/ethnicorigin/DNA
A chemical blueprint can be created so that the drug can be printed at any pharmacy/druggist/drug store
...using specific components/compounds
Drug can be personalised for/targeted to a specific illness/infection

## disadvantage for making medicine

Human errors in use of blueprints/mislabelling can lead to incorrect drug being created
...incorrect dosage being used
Difficult to validate/verify drug creation so, e.g. incorrect base materials may be used
Difficult to regulate use of the drug/printing machines across (international) borders
Difficult to regulate the supply of the drugs once blueprint is published/available to patient
Bio-safety/hygiene/sanitary/cleanliness of production difficult to control at home
Could be used/customised to produce illegal drugs