1,760
Participants
Start Date
April 30, 2015
Primary Completion Date
June 30, 2015
Study Completion Date
February 28, 2017
investigational 23-valent PPV
The investigational vaccine was manufactured by Sinovac Biotech Co., Ltd.
control 23-valent PPV
The control vaccine was manufactured by Chengdu Institute of Biological products Co., Ltd.
Kaifeng County Center for Disease Control and Prevention, Kaifeng
Sinovac Biotech Co., Ltd
INDUSTRY