inclusion criteria: * age between five and eleven years (i.e. prior to the twelfth birthday) at the time of enrolment, * participant who was randomised in the mis bair trial, and * was randomly allocated to receive and received bcg as part of the mis bair trial, or, * was randomly allocated to not receive and did not receive bcg; * is an individual whose parent/legally acceptable representative (lar) consented to be contacted about future ethically approved research, during the mis bair trial consent process, and * has a parent/lar capable of understanding the parent/lar information statement and consent form (picf) document and providing consent on the participant's behalf.

inclusion criteria: * age between five and eleven years (i.e. prior to the twelfth birthday) at the time of enrolment, * participant who was randomised in the mis bair trial, and * was randomly allocated to receive and received bcg as part of the mis bair trial, or, * was randomly allocated to not receive and did not receive bcg; * is an individual whose parent/legally acceptable representative (lar) consented to be contacted about future ethically approved research, during the mis bair trial consent process, and * has a parent/lar capable of understanding the parent/lar information statement and consent form (picf) document and providing consent on the participant's behalf.

inclusion criteria: age between five and eleven years (i.e. prior to the twelfth birthday) at the time of enrolment, participant who was randomised in the mis bair trial, and was randomly allocated to receive and received bcg as part of the mis bair trial, or, was randomly allocated to not receive and did not receive bcg; is an individual whose parent/legally acceptable representative (lar) consented to be contacted about future ethically approved research, during the mis bair trial consent process, and has a parent/lar capable of understanding the parent/lar information statement and consent form (picf) document and providing consent on the participant's behalf.

inclusion criteria: age between five and eleven years (i.e. prior to the twelfth birthday) at the time of enrolment, participant who was randomised in the mis bair trial, and was randomly allocated to receive and received bcg as part of the mis bair trial, or, was randomly allocated to not receive and did not receive bcg; is an individual whose parent/legally acceptable representative (lar) consented to be contacted about future ethically approved research, during the mis bair trial consent process, and has a parent/lar capable of understanding the parent/lar information statement and consent form (picf) document and providing consent on the participant's behalf.