Year 2011-2015 2011-2015 2020 2021
Wave Whole cohort Clinical sub-sample COVID Immune (Baseline) COVID Immune (12 mth follow-up)
Age 10-14 years 10-14 years 15-24 years 16-25 years
Venous blood Child: 253 Child: TBD Child: TBD
Buccal Child: 314
Newborn screening (Guthrie) card Child: 284
Dried blood spot   Child: TBD Child: TBD


A = Administration report abstraction
C = Index child report (reporting on others)
L = Linkage (to other databases)
M = Medical records data abstraction
O = Observation/direct assessment
N = Nurse report
P = Parent/primary caregiver report
Pe = Peer report
S = Self report
T = Teacher report
X = Undefined
X BF = Pertaining to biological father
X BM = Pertaining to biological mother
C = Pertaining to index child
X F = Pertaining to father
X Fam = Pertaining to family
X G = Pertaining to grandparent(s)
X M = Pertaining to mother
X P = Pertaining to parent(s)
X Pa = Pertaining to partner
X Pe = Pertaining to peers
X Pr = Pertaining to primary caregiver
X Si = Pertaining to sibling(s)