Acute phase responses in children and elderly during acute COVID‐19 phase. Plasma levels of C‐reactive protein (CRP), α‐2 macroglobulin, haptoglobin, and serum amyloid P (SAP) were quantified in acute COVID‐19 children (n = 12), convalescent COVID‐19 children (n = 19), acute elderly COVID‐19 individuals (n = 35), and convalescent elderly COVID‐19 individuals (n = 114). In the graphical representation, the maroon color corresponds to acute COVID‐19 children, pink represents convalescent COVID‐19 children, dark blue denotes acute elderly COVID‐19 individuals, and light blue signifies convalescent elderly COVID‐19 individuals. Statistical significance (p values) was determined using the Mann–Whitney U test with Holm's multiple correction analysis for multiple comparisons.