Trial Profile

Effectiveness of CoronaVac First Booster Dose for Preventing Symptomatic Acute Respiratory Infection Caused by SARS-CoV-2 Virus in Adults in São Paulo City, Brazil: a Retrospective Test-negative Case-control Study

Status: Active, no longer recruiting

Phase of Trial: Phase IV

Latest Information Update: 04 Apr 2024

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At a glance

11 Jan 2023 Planned End Date changed from 15 Nov 2022 to 15 Feb 2023.
11 Jan 2023 Status changed from not yet recruiting to active, no longer recruiting.
13 Jul 2022 Planned initiation date changed from 15 May 2022 to 30 Jul 2022.

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