organs

There is a great shortage of organs for transplanting to people who need them–in the UK, for instance, the average wait for a new heart has risen 70% over the last 3 years and patients needing a new kidney have to wait 20% longer. This organ shortage is killing 3 people a day there (and probably many more in the US), but this probablem is finally being solved: We have synthetic blood and hearts made from YOUR OWN stem cells. Now the kind of 3 D printers used in architecture may be able to "print" new organs that can be transplanted into the human body.
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