we can make transport robots from dna.. http://www.nature.com/news/dna-robot-could-kill-cancer-cells...

this lecture from 2014 goes into more detail: hhttps://youtu.be/aA-H0L3eEo0?t=453 ; talking about using essentially biological logic gates

then they announced human trial on a patient with late stage leukemia(o) ..the announcement with sobering top comment referencing protein built robots mentioned elsewhere in this thread(i)

then a partnership with pfizer(ii)

then crickets(iii)

(o) https://www.nextbigfuture.com/2014/12/ido-bachelet-announces...

(i) https://www.nextbigfuture.com/2015/05/pfizer-partnering-with...

(ii) https://www.reddit.com/r/Futurology/comments/2qkjgc/short_cl...

(iii) https://www.reddit.com/r/Futurology/comments/3czhpx/any_info...