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CompletedNCT04478019SHIELDUpdated Jul 14, 2022

SHIELD Study: Using Naso-oropharyngeal Antiseptic Decolonization to Reduce COVID-19 Viral Shedding

An Early Phase 1 interventional study of 10% Povidone-iodine nasal decolonization swab plus 0.12% CHG oral rinse in COVID-19 and SARS-CoV 2, sponsored by University of Wisconsin, Madison. Completed at 1 site in United States. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-07-14.

Sponsored by University of Wisconsin, Madison · Early Phase 1, Interventional, and Prevention

From the registry’s dates

  • Primary completion was Jun 2022, 4 years 3 months ago, and no results have been posted to the registry.
Phase
Early Phase 1
Study type
Interventional
Enrollment
245
Allocation
Randomized
Ages
18 Years and older
Sex
All
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Study summary

Essential workers in positions with increased likelihood of exposure to SARS-CoC-2 will be most impacted by the proposed project. Evidence has shown that the SARS-CoV-2 novel coronavirus is easily transmissable through close contact between individuals, especially during aerosol-generating procedures such as intubation of patients. The intervention proposed in this study (nasal and oral decontamination with povidone-iodine and chlorhexidine, respectively) presents an opportunity for a safe, effective, and feasible treatment to decontaminate the primary entry points for SARS-CoV-2. As such, the intervention to be studied in this project may protect healthcare and other essential workers by preventing transmission of SARS-CoV-2 from patients to healthcare workers, as well as the general public to essential worker,. and thus reducing the incidence of COVID-19 in these workers.

02

Conditions studied

  • COVID-19
  • SARS-CoV 2

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Keywords

  • COVID-19
  • povidone-iodine
  • chlorhexidine gluconate
  • transmission
  • virology
03

In context

COVID-19

7,640 studies on the registry are indexed under COVID-19; 488 are open to participants now.

This study's enrollment of 245 is above the median of 100 across 4,099 interventional studies indexed under COVID-19.

Browse COVID-19 studies →

Lead sponsor

University of Wisconsin, Madison is the lead sponsor of 1,161 studies on the registry; 182 are open to participants now.

Of its 151 completed or terminated interventional studies of FDA-regulated products, 114 (75%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Participant is a essential worker performing at least some in-person job duties (not 100% remote)
  • Participant is willing and able to perform intervention and data collection procedures.
  • Participant is able to provide informed consent in English language.

Exclusion criteria

Exclusion Criteria:

  • Diagnosis of COVID-19 within 2 months prior to enrollment, or active respiratory illness symptoms at time of enrollment
  • Known medical contraindication to chlorhexidine gluconate or povidone-iodine treatment ingredients (such as a known allergy)
  • Participant has a known medical and/or surgical reason prohibiting nasal swab sampling.
  • Participant is female who is pregnant, or believes she may be pregnant, at time of enrollment.
  • Participant is actively taking/using any treatments or interventions as part of any other COVID-19 related investigational trials.
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Study design

Phase
Early Phase 1
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Crossover assignment
Masking
None (open label)
Enrollment
245 participants (actual)

Study arms

  • Other
    Control > Active Intervention

    Treatment is 3 weeks of standard personal protective equipment without any povidone-iodine (PI) or chlorhexidine gluconate (CHG) intervention (control), followed by a 2 weeks washout period, and 3 weeks of nasal (10% povidone-iodine swab sticks in each nostril) and CHG oral decolonization (swish and spit 15 ml 0.12% CHG oral rinse for 30 seconds, four times/day) procedures.

    Drug: 10% Povidone-iodine nasal decolonization swab plus 0.12% CHG oral rinse

  • Other
    Active Intervention > Control

    Treatment is 3 weeks of nasal (10% povidone-iodine swab sticks in each nostril) and CHG oral decolonization (swish and spit 15 ml 0.12% CHG oral rinse for 30 seconds, four times/day) procedures, followed by 2 weeks of washout, and 3 weeks of standard personal protective equipment without any PI or CHG intervention (control).

    Drug: 10% Povidone-iodine nasal decolonization swab plus 0.12% CHG oral rinse

Interventions

  • Drug10% Povidone-iodine nasal decolonization swab plus 0.12% CHG oral rinse

    2 swab sticks of 10% povidone-iodine in each nares and 0.12% CHG oral rinse

06

What researchers measure

Primary outcomes

  1. Number of Participants with COVID-19 diagnosis

    Participants will be monitored for positive COVID-19 test results during this trial

    Time frame: 8 weeks

  2. SARS-Cov-2 Viral Load

    Viral load will be measured as a continuous outcome for each participant (three times per week) throughout this trial.

    Time frame: 8 weeks

Secondary outcomes

  1. Fidelity of the treatment regimen

    Assessment of fidelity (as measured by percentage of compliance) to the treatment regimen will be measured by participants' reporting of intervention doses take through a daily treatment diary.

    Time frame: 8 weeks

  2. Feasibility of the treatment regimen

    A survey asking subjects to rank several factors that contribute to overall feasibility of use will be given pre- and post-intervention treatment.

    Time frame: 2 weeks total: 1 week (pre-intervention) and 1 week after completion of intervention (post-intervention)

07

Study locations

1 site
  • University of Wisconsin-Madison
    Madison, Wisconsin 53705, United States
08

References and documents

Individual participant data

Plan to share: Yes — De-identified study results will be shared with other researchers.

Supporting information: Study protocol, Csr

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 14, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04478019
Lead sponsor
University of Wisconsin, Madison
Responsible party
Sponsor
First posted
Jul 20, 2020
Start date
Jul 7, 2020
Primary completion
Jun 30, 2022
Completion
Jun 30, 2022
Last update
Jul 14, 2022

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jul 2022. You cannot join it, but the record below documents what was studied.

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