We found data on 27 signs and symptoms, which fall into four different categories: systemic, respiratory, gastrointestinal and cardiovascular signs and symptoms. There were no analyses for combinations of tests, only for individual signs and symptoms. The results are summarised in Table 3. Results for the cross‐sectional studies are presented in forest plots (Figure 4; Figure 5; Figure 6; Figure 7), and are plotted in ROC (receiver operating characteristic) space (Figure 8; Figure 9; Figure 10; Figure 11), results for the other studies are only listed in forest plots (Figure 12; Figure 13; Figure 14; Figure 15).