GSTM1 and malaria: The main reasons for ineligibility, alone or in combination, were: not willing to practice contraception (n = 4); ALT >45 U/L (n = 4); blood pressure outside of normal range (n = 4); from outside Ouagadougou (n = 2); low Hb (n = 1); malaria episode (n = 1); peripheral neuropathy (n = 1); neurological pathology (n = 1); and screening to vaccination date exceeded 28 days (n = 1).