Analysis of laboratory parameters for SARS‐CoV‐2 detectable and SARS‐CoV‐2 non‐detectable cohorts revealed hyponatremia, eosinopaenia, and raised C‐reactive protein (CRP) as predictive markers for SARS‐CoV‐2 positivity (Table 4). Here, CRP is linked to Hyponatremia.