作者: Luzhao Feng , Anthony Wayne Mounts , Yunxia Feng , Yuan Luo , Peng Yang
DOI: 10.1016/J.VACCINE.2010.07.064
关键词:
摘要: … The disease carries significant risk of severe or fatal outcome in the very young, the elderly, … China [5], [6], [7], [8], [9]. Estimates of the numbers of persons with chronic medical conditions …