The links you kindly shared are commercial links posted by a water treatment chemical company that has a commercial interest in promoting using ClO2 rather than other chemicals for water treatment. It may be that everything they say about ClO2 as a water treatment chemical checks out with what independent researchers say, but there is no support here for the idea that ClO2 is an effective internal medicine for malaria infection.
AFTER EDIT: To reply to your kind reply below, I am aware of what reply layer we are in here. But the submitted article, after all, was about treatment of human patients who have already been infected by the malaria parasite. For a top-level comment then to come in under that article that has nothing to do with internal medicine use of the advocated chemical is, at least, a sign of careless reading, and possibly a sign of greater tendentiousness. (Other participants here have pointed out the several words and phrases in several of the comments to which I am replying that suggest that that subthread is not based on familiarity with medical research and the methods of medical research.)