The association of a single sign or symptom with COVID‐19 is highly uncertain, and we do not have data on combinations of signs and symptoms. Additionally, potentially more diagnostic symptoms such as loss of sense of smell have not yet been studied widely and remain to be assessed in well designed studies. Moreover, the nature of the signs and symptoms that are used to guide self‐isolation decisions are such that people may end up being quarantined on a regular basis, leading to missed days at school or work, isolation and anxiety.