Table 1: Characteristics of study participants. (n= Number, Risk factors: hypertension, diabetes mellitus, etc.)

During the two month period of this study, SARS-COV-2 RT-PCR test results were positive in three participants (9.67%) in placebo group compared to no positive test in synbiotic group. The difference was not statistically significant (p= 0.238).

During the study, two persons (7 %) of placebo group had respiratory complaint such as cough, rhinorrhea and/or dyspnea, compared with one in synbiotic group (p= 0.19). Three persons in placebo group revealed gastrointestinal manifestations like diarrhea, vomiting and abdominal pain while two patients in intervention group revealed diarrhea, nausea and/or vomiting (p=0.67). Only one case in placebo group had disturbance in gustatory and smell senses (Table 2).