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A study to identify SARS-CoV2 variants and assess potential risk of their spread from COVID-19 patients infected after taking one or two doses of vaccine

Impact of COVID-19 Vaccination on Transmission Risk of Acquired Infection and Strain Characteristics

Status
Recruiting
Phases
Unknown
Study type
Observational
Source
CTRI
Registry ID
CTRI/2021/07/035143
Enrollment
150
Registered
2021-07-26
Start date
Unknown
Completion date
Unknown
Last updated
2021-11-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Health Condition 1: B972- Coronavirus as the cause of diseases classified elsewhere

Interventions

Intervention1: NIL: NIL

Sponsors

Dr Kalpana Sriraman
Lead Sponsor
Dr Chandrakant Pawar Infrastructure Support
Collaborator
Dr Nerges Mistry
Collaborator
Dr Vikas Oswal
Collaborator

Eligibility

Inclusion criteria

Inclusion criteria: 1. Consenting COVID-19 positive individuals of age >18 years with or without vaccination 2. Should not be greater than five days from onset of symptoms for COVID-19 at the time of recruitment 3. Should not be greater than 48 hours from knowing positive COVID-19 diagnosis at the time of recruitment

Exclusion criteria

Exclusion criteria: 1. Severely ill COVID-19 patients ( who have SpO2 levels less than 90% and on continuous oxygen support or ventilator support) 2. Individuals who have taken mRNA vaccines, if approved by the time of study

Design outcomes

Primary

MeasureTime frame
Transmission risk: â?¢ Proportion of vaccinated individuals expelling virus in respiratory particles compared to unvaccinated individuals â?¢ Proportion of vaccinated individuals who do not expel virus after 8 days of symptom onset Sequencing â?¢ The proportion of variants among infections occurring after initiation of vaccination compared to unvaccinated group â?¢ Identification of new mutations and variants, if any associated with breakthrough infections in Mumbai Timepoint: 1. 0-5 days of symptom onset 2.8-10 days of symptom onset

Secondary

MeasureTime frame
NoneTimepoint: NA

Countries

India

Contacts

Public ContactDr Nerges Mistry

The Foundation for Medical Research

kalpanasriraman@yahoo.com912224934989

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Feb 4, 2026