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Objectives  Primary Objective  • To assess the efficacy of herbal extracts in boosting innate immunity of patients with COVID-19 infection.  Secondary Objectives  • To assess the efficacy of herbal extracts in restoring respiratory health  • To assess the efficacy of Cap. IP in early recovery of patients and decline in viral load  • To assess the safety of herbal extracts    Trial design  This is a single centre, randomized, 2-arm, parallel group, double blind, 1:1 ratio, controlled, exploratory trial with a study period of 30 days from the day of enrolment.    Participants  Patients attending the COVID treatment centre at Yashwantrao Chavan Memorial Hospital, Nehrunagar, Pimpri, Pune, India were screened for their participation in the study. Patients who were known COVID-19 positive (with positive RT-PCR), eligible and willing were enrolled in the study.    Intervention and comparator  The intervention in the trial has a background in ‘Ayurved’. Intervention Arm: Two capsules, Investigational Product (IP) - 1 - 400mg and Investigational Product - 2 - 450mg, containing herbal extracts (a blend of water and CO 2  extracts) of Shunthi ( Zingiber officinale  (Ginger), Vidanga ( Embelia ribes ), Yashtimadhu ( Glycyrrhiza glabra ), Haritaki ( Terminalia chebula ), Guduchi ( Tinospora cordifolia ), Shatavari ( Asparagus racemosus ), Aamalaki ( Emblica officinalis ), Pippali ( Piper longum ) and calcined Zinc, Shankha bhasma.  Placebo Arm: Edible starch ~ 450 mg. The look and feel of IP and of Placebo boxes were very similar.  Patients are to take two capsules (one each of IP-1 and IP-2) twice a day for 15 days, and from the 16th day, one capsule of IP-2 twice a day up-to day 30. Capsules are to be administered orally with plain water.  The IP is to be taken with all other concomitant medicines prescribed by the treating physician/doctor.  The dose of each component in the IP is very safe to administer. The investigational products are registered products with the Indian Government and have been used for more than 6 months in various health conditions but not for COVID-19.    Main outcomes  Primary Outcome:  Efficacy of the herbal extracts in COVID 19 positive patients (in declining viral load: time-point: 4 days and early recovery)  Secondary Outcomes:  Efficacy of the herbal extracts as an immune-modulator - TH1, TH2, Th17, IL6, NK Cells and CD markers; Immunoglobulin IGG (Serum); Immunoglobulin IGM (Serum) - at 30 days.  Efficacy of the investigational product in reducing sequela of the disease  Safety analysis (Liver Function Test and Kidney Function Test) including serious allergic reaction of: rash, itching/swelling, severe dizziness, trouble breathing.    Randomisation  An alphanumeric coded set of IP/Placebo containers will be used. Participants will be automatically randomized to two groups in the ratio 1:1.    Blinding (masking)  Participants, caregivers and investigators were blinded.    Numbers to be randomised (sample size)  A total of more than 60 and up to 75 patients were to be enrolled in the study into the two groups, considering drop-outs. 72 were enrolled with 37 into the intervention group and 35 into the placebo group.    Trial Status  Protocol number: CoviQuest-01  Protocol version number: 1.2  Protocol Date: 1 st  July 2020  The recruitment period is completed for the trial. Date of 1 st  patient enrolment was 11 th  Aug 2020 and the last patient was enrolled on 3 rd  of September 2020.  This is to state that it was a late submission from authors for publication of the protocol to the BMC, after enrolment in the study was over.  Last Participant’s last follow-up is scheduled on 5 th  October 2020    Trial registration  The trial was prospectively registered with the CTRI (Clinical Trial Registry of India). Registration number is  CTRI/2020/07/026570 . Registered on 14 July 2020    Full protocol  The full protocol is attached as an additional file, accessible from the Trials website (Additional file  1 ). In the interest in expediting dissemination of this material, the familiar formatting has been eliminated; this Letter serves as a summary of the key elements of the full protocol.

trials

Safety and efficacy of herbal extracts to restore respiratory health and improve innate immunity in COVID-19 positive patients with mild to moderate severity: A structured summary of a study protocol for a randomised controlled trial