CovidResearchTrials by Shray Alag


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Report for D058345: Asymptomatic Infections NIH

(Synonyms: Asymptomatic Infections)

Developed by Shray Alag
Clinical Trial MeSH HPO Drug Gene SNP Protein Mutation


Correlated Drug Terms (6)


Name (Synonyms) Correlation
drug569 COVID-19 test, polymerase chain reaction for SARS-CoV-2 Wiki 0.71
drug1499 Ivermectin Pill Wiki 0.71
drug716 Combined ART/hydroxychloroquine Wiki 0.71
drug3087 Vitamin D 1000 IU Wiki 0.71
drug572 COVID-surgRES questionaire Wiki 0.71
drug2122 Placebo Wiki 0.04

Correlated MeSH Terms (6)


Name (Synonyms) Correlation
D014808 Vitamin D Deficiency NIH 0.27
D012141 Respiratory Tract Infections NIH 0.14
D003141 Communicable Diseases NIH 0.11
D007239 Infection NIH 0.07
D045169 Severe Acute Respiratory Syndrome NIH 0.03
D018352 Coronavirus Infections NIH 0.03

Correlated HPO Terms (2)


Name (Synonyms) Correlation
HP:0100512 Low levels of vitamin D HPO 0.27
HP:0011947 Respiratory tract infection HPO 0.14

There are 2 clinical trials

Clinical Trials


1 Comparative Efficacy of Ivermectin Versus Combination of Hydroxychloroquine Plus Darunavir/ Ritonavir for Shortening Duration of SARS-CoV2 Detection From Respiratory Secretion Among Asymptomatic or Afebrile COVID-19 Infection

This is an open label randomised controlled study of oral ivermectin (600 mcg/kg/d* 3 day) versus combined of hydroxychloroquine plus darunavir/ ritonavir for 5 days treatment among asymptomatic carrier of SAR-CoV2 adult Thai population. Outcomes include safety and duration of detectable of SAR-CoV2 in nasopharyngeal/ throat (NP) swab by polymerase chain reaction amplification (PCR) after treatment. 40-50 patients in each treatment arm is planned, with an interim analysis when approximately 50% of cases is enrolled.

NCT04435587 Asymptomatic Infections SARS-CoV2 Infection Drug: Ivermectin Pill Drug: Combined ART/hydroxychloroquine
MeSH:Infection Communicable Diseases Asymptomatic Infections

Primary Outcomes

Description: Comparison of adverse event rates between treatment arms

Measure: Adverse event rates

Time: after first dose until day 28 of follow up

Description: comparison of median duration for detectable SAR-CoV2 by PCR from NP swab in each arm

Measure: Efficacy for shortening duration of SAR-CoV2 detection by PCR

Time: weekly after treatment until 4th week

Secondary Outcomes

Description: comparison of median duration for total antibody detection in each arm

Measure: Antibody detection rates

Time: weekly after treatment until 4th week

2 Reducing Asymptomatic Infection With Vitamin D in Coronavirus Disease

This study is intended to address whether oral daily vitamin D supplementation reduces infection with SARS-CoV-2 in healthy young adults. The primary aim of the study is to demonstrate a reduction in 'silent' seroconversion rates, consistent with asymptomatic transmission of SARS-CoV-2, in a young healthy adult population following 24 weeks of taking oral vitamin D supplemented at a dose of 1000 I.U. daily, versus matching placebo. The secondary aims of this study are to explore: 1. Any effect on symptomatic illness. 2. The background 'point' prevalence and subsequent rate of increase in seropositivity for SARS-CoV-2 in healthy young adults. 3. The individual reductions in seropositivity to SARS-CoV-2 over time, and changes in seropositivity in a defined young adult population over time. 4. Where salivary Immunoglobulin A (IgA) may be used to provide an alternative/ complementary serological method 5. The effect (if any) of vitamin D supplementation on seroconversion rates stratified by: i) level of baseline vitamin D 'deficiency/ insufficiency/ sufficiency' status; ii) extent of BMI-defined normal/overweight/obesity cut-offs and iii) gender.

NCT04476680 SARS-CoV Infection Vitamin D D Vitamin D Deficiency Covid19 Acute Respiratory Tract Infection Dietary Supplement: Vitamin D 1000 IU Drug: Placebo
MeSH:Infection Communicable Diseases Respiratory Tract Infections Coronavirus Infections Severe Acute Respiratory Syndrome Vitamin D Deficiency Asymptomatic Infections
HPO:Low levels of vitamin D Respiratory tract infection

Primary Outcomes

Description: asymptomatic seroconversion for SARS-CoV-2

Measure: Seroconversion

Time: 24 weeks

Description: asymptomatic seroconversion for SARS-CoV-2

Measure: Interim analysis - seropositivity at 12 weeks

Time: 12 weeks

Secondary Outcomes

Description: Sensitivity and specificity of dried blood spot assay compared with venous blood serology

Measure: Dried Blood Spot performance

Time: 24 weeks

Description: Sensitivity and specificity of salivary IgA compared with venous blood serology

Measure: Salivary IgA performance

Time: 24 weeks

Description: The background 'point' prevalence and subsequent rate of increase in seropositivity for SARS-CoV-2 in healthy young adults.

Measure: Prevalence of SARS-CoV-2

Time: 24 weeks

Description: The individual reductions in seropositivity to SARS-CoV-2 over time, and changes in seropositivity in a defined young adult population over time

Measure: Change in seropositivity

Time: 24 weeks

Description: The effect of vitamin D supplementation on seroconversion rates stratified by: i) level of baseline vitamin D 'deficiency/ insufficiency/ sufficiency' statusÍž ii) extent of BMI-defined normal/overweight/obesity cut-offs, iii) gender iv) ethnicity

Measure: Change in seroconversion rate

Time: 24 weeks


HPO Nodes