Data for the samples collected from the three women found infected with <i>P. vivax</i>.

<p>Days when treatment with artemether-lumefantrine (CoA) or IPTp using sulfadoxine-pyrimethamine (SP) was administered are indicated. Del denoted the day of delivery. Samples for PCR or thick blood smears (TBS) were only available for the weeks indicated on the time axis, and the results are presented above this axis. The parasite species identified by PCR or microscopy are provided, as is the average parasitaemia (parasites per µl of blood) recorded for each species: F = <i>P. falciparum</i>; V = <i>P. vivax</i> (shown in red); O = <i>P. ovale</i>; N = negative sample, and “-“ denotes a missing sample. The patient codes provided are those internally and randomly assigned upon recruitment. Samples from patient C012080 from which the <i>Pvdhfr</i> fragment could be amplified and sequenced are indicated by an asterisk (*).