Engineers have discovered that drug-carrying nanoparticles have a big hurdle to overcome: escaping the bloodstream.Drug delivery systems promise precision targeting of diseased tissue, meaning that medicines could be more effective at lower doses and with fewer side effects. Such an approach could treat plaques in arteries, which can lead to heart attacks or strokes.

 February 6, 2013- Source: http://www.futurity.org/blood-cells-block-nano-drug-delivery/

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