Blinding
fever
The study participants will not be blinded to their vaccination statuses as there is no control vaccine. Only the teams conducting fever surveillance and monthly contacts will be blinded to this and be trained to not seek out vaccination details. The coding for the primary analysis will be first conducted in a dataset with ‘dummy’ cluster and trial arm identifiers, and only then applied to the full dataset. This will be replicated by an independent analyst, who has not viewed the original results.