---
title: "Kangtai Biological: Quadrivalent Influenza Virus Split Vaccine Starts Phase I Clinical Trial"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/263985445.md"
description: "Kangtai Biological announced that its developed quadrivalent influenza virus split vaccine has completed preparations for Phase I clinical trials, which have now commenced, and the first subject has been successfully enrolled. The vaccine is suitable for individuals aged 6 to 35 months and aims to stimulate immunity to prevent influenza virus. The trial employs a single-center, randomized, blind, positive control design to evaluate the vaccine's safety and preliminary immunogenicity"
datetime: "2025-11-03T10:12:36.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/263985445.md)
  - [en](https://longbridge.com/en/news/263985445.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/263985445.md)
---

# Kangtai Biological: Quadrivalent Influenza Virus Split Vaccine Starts Phase I Clinical Trial

Kangtai Biological announced that the phase I clinical trial preparation for its quadrivalent influenza virus split vaccine has been completed, and the phase I clinical trial has commenced, successfully enrolling the first subject recently. This vaccine is suitable for individuals aged 6 to 35 months and can stimulate the body to produce immunity against influenza viruses, aimed at preventing influenza caused by vaccine-related strains. The phase I clinical trial for the quadrivalent influenza virus split vaccine is designed as a single-center, randomized, blind, positive-control study, aimed at evaluating the safety and preliminary immunogenicity of the vaccine in the 6 to 35-month age group

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