IL2 and infection: To investigate whether the increased T‐cell responses observed amongst naïve/unknown participants with no history of confirmed infection were indicative of asymptomatic SARS‐CoV‐2 infection, we further compared the magnitude of IFN‐γ+ or IL‐2+ T‐cell responses with evidence of antibody seroconversion; eleven such participants were identified as having both a positive anti‐RBD IgG response (>0·27) and positive IFN‐γ+ and/or IL‐2+ T‐cell response using the above criteria for defining positive/negative cut‐offs.