HDGFL2 and infection: Blood samples from infections with P. falciparum parasites lacking the pfhrp2 gene showed, on average, much lower concentrations of HRP2/3 antigens: log-normal mean of 421 pg/mL in pfhrp2–/pfhrp3+ samples and log-normal mean of 2.0 pg/mL in pfhrp2–/pfhrp3– samples.