Table 1 Demographic characteristics of the two study populations

Symptoms

Symptomatic

Asymptomatic

Age (years)^a

29 (7–71)

26.5 (4–72)^b

Proportion male

58.8%

63.3% ^b

Self-reported past malaria exposure (yes/no)

52.9% had past exposure

56.7% had past exposure

Study duration

9 months

14 months

Time points with antibody measurements

17

10–14

P. vivax infection^c

Enrolment (w0)

Enrolment—6 months

Recurrent infection

No

No

Treatment

Chloroquine (3 days) & Primaquine (14 days)

N/A

Parasite density at enrolment (copies/mL)^{a, c}

2.5 × 10⁵ (2.85 × 10⁴–6.84 × 10⁶)

1.03 × 10² (2.44 × 10⁻¹–9.58 × 10⁵)

P. vivax infections remained detectable (months)^{c, d}

N/A

1 (1-4)