2.2.4. Outcomes
COLD SYMPTOMS, SECONDARY
The primary outcome of this study was the result of the daily physical health questionnaire survey on the common cold symptoms. The secondary outcomes were the salivary sIgA concentration, the secretion rate, and the amount of secretion; serum IgA and immunoglobulin G (IgG) levels; NK cell activity; pDC activity; body temperature; fecal microbiota, and the Profile of Mood States, 2nd Edition (POMS2) score.