Group 1 - Jiangsu Zhonghui Yuantong Biotechnology Co., Ltd. and its subsidiary Yihui Biotechnology (Shanghai) Co., Ltd. have successfully initiated Phase I clinical trials for two new influenza vaccines: "Influenza Virus Subunit Vaccine (Adjuvant)" and "Quadrivalent Influenza Virus Subunit Vaccine (Adjuvant)" in Hubei province [1] - The World Health Organization (WHO) reports that there are approximately 3 to 5 million severe cases of influenza globally each year, with an average of about 88,000 excess deaths due to respiratory diseases caused by influenza in China from 2010 to 2015 [3] - The overall vaccination rate for influenza in China remains low, with only 3.84% during the 2022-2023 flu season, indicating a significant challenge in establishing an effective immune barrier against influenza [3] Group 2 - The "Adjuvanted Influenza Virus Subunit Vaccine" is designed to meet the vaccination needs of different populations, particularly targeting individuals aged 65 and older, utilizing the company's established platform technology and new adjuvants [4] - The vaccine is administered via intramuscular injection in the deltoid muscle, with low-dose and high-dose groups receiving 0.25ml and 0.5ml per dose, respectively, over a total of one dose on day 0 [4] - Preclinical studies indicate that the adjuvanted influenza virus subunit vaccine significantly enhances antibody levels and neutralizing antibody titers, providing a superior option for the elderly population to combat influenza [4] Group 3 - Zhonghui Biotechnology is focused on the research, development, manufacturing, and commercialization of innovative vaccines and traditional vaccines using new technologies, with a continuous increase in R&D investment [5] - The company has received clinical approval for several products, including recombinant zoster vaccine, adjuvanted influenza virus subunit vaccine, and lyophilized human rabies vaccine, with multiple innovative vaccine pipelines under development [6] - The company has established large-scale production capabilities, with a first-phase facility covering approximately 68 acres and equipped with international-level GMP production lines for influenza raw materials and formulations [6]