Question, the article states that the device should be able to determine whether the malaria parasite has infected the subject while they are asymptomatic. From

Question, the article states that the device should be able to determine whether the malaria parasite has infected the subject while they are asymptomatic. From my limited knowledge of malaria, I was under the impression that during the asymptomatic stage, malaria is multiplying in the liver and does not infect any red blood cells. How will this detect malaria if they are not excreting the iron crystals into the blood stream?