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CompletedNCT05328479Updated Oct 19, 2022

Plasma Immunity of Mild SARS-CoV-2 Omicron and Delta Pandemic in Thailand

An observational study in COVID-19, sponsored by Mahidol University. Completed at 1 site in Thailand. Open to participants aged 12 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-10-19.

Sponsored by Mahidol University · Observational

Study type
Observational
Model
Cohort
Time perspective
Retrospective
Enrollment
5,181
Ages
12 Years and older
Sex
All
01

Study summary

The investigators assessed the effect of treatment for COVID and immunity of the volunteers who admitted to the home isolation.

Read the detailed description

The investigators aimed to assess the effect of treatment for COVID and immunity of the volunteers who admitted to the home isolation. The investigators compared the population between the age groups 12-18 years, 18-45 years and over 45 years to monitor the symptoms of coronavirus patients treated in home isolation and long-term symptoms including factors related to the patient's recovery in the past, present, and future.

02

Conditions studied

  • COVID-19

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Keywords

  • COVID-19
  • antibody
  • immunity
  • home isolation
  • vaccine
03

In context

COVID-19

7,775 studies on the registry are indexed under COVID-19; 482 are open to participants now.

This study's enrollment of 5,181 is above the median of 260 across 3,188 observational studies indexed under COVID-19.

Browse COVID-19 studies →

Lead sponsor

Mahidol University is the lead sponsor of 744 studies on the registry; 116 are open to participants now.

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

04

Who can participate

Ages eligible
12 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Probability sample

Study population

The COVID-19 patients who confirmed by RT-PCR at Siriraj hospital since July 8, 2021 with mild to moderate symptoms and isolated in patients' own home so-called "Siriraj Home isolation".

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. patient with infected with the novel coronavirus disease 2019 (COVID-19) who has been end of self-quarantine at Siriraj Hospital more than 21 days.
  2. Thai nationality, able to read and write Thai language
  3. able to use telephone and line to communicate

Exclusion criteria

Exclusion Criteria:

1. people who received additional vaccination after leaving quarantine before the day of the immunization test

05

Study design

Observational model
Cohort
Time perspective
Retrospective
Enrollment
5,181 participants (actual)
Patient registry
No
Biospecimen retention
Samples without dna
06

What researchers measure

Primary outcomes

  1. Anti-SARS-CoV-2 RBD IgG

    Anti-RBD IgG (BAU/mL)

    Time frame: Baseline

  2. Anti-SARS-CoV-2 NP

    Anti-SARS-CoV-2 NP (PRNT50 titer)

    Time frame: Baseline

  3. Cycle threshold of the first PCR test

    Cycle threshold (Ct)

    Time frame: Baseline

Secondary outcomes

  1. Number of vaccine injection

    Number of vaccine injection

    Time frame: Baseline

  2. Type of vaccine injection

    Type of vaccine injection

    Time frame: Baseline

07

Study locations

1 site
  • Faculty of Medicine Siriraj Hospital, Mahidol University
    Bangkok Noi, Bangkok 10700, Thailand
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Nov 2021 to primary completion in Mar 2022, 4 months.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 7, 2022
First posted
Apr 14, 2022
StartActual
Nov 4, 2021
Primary completionActual
Mar 15, 2022
CompletionActual
May 20, 2022
Last update
Oct 19, 2022
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Oct 19, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT05328479
Lead sponsor
Mahidol University
Responsible party
Sponsor
First posted
Apr 14, 2022
Start date
Nov 4, 2021
Primary completion
Mar 15, 2022
Completion
May 20, 2022
Last update
Oct 19, 2022

Study contacts

Korapat Mayurasakorn, MD.
principal investigator · Doctor in Family Medicine

Oversight

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

Not currently enrolling

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

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