Chinese scientist creates microbot , that can carry huge payloads of drug to the diseased parts of the body. Initially they did test on rabbit and mice. These microbot have the size of a cell and is injected to the human body without making any wounds and it's guided to the target organs wirelessly with the help of electromagnetic field. For that the microbot is coated with nickel. The major challenge in applying this in humans, is the difficulty in tracking the microbot in its journey to the target. This method can be effectively used in the case of stoke and retinal degeneration and can be treated without surgery.
The link of the article from where I collected the information is given below.
http://www.scmp.com/news/hong-kong/article/1308876/chinese-university-scientists-build-tiny-robot-battle-human-diseases
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