
Evaluation on effectiveness of free influenza vaccination among the elderly in Fengtai District of Beijing
JIANG Xiao-fei, TANG Tian, MAO Wen-wen
Practical Preventive Medicine ›› 2022, Vol. 29 ›› Issue (9) : 1068-1071.
Evaluation on effectiveness of free influenza vaccination among the elderly in Fengtai District of Beijing
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