Practical Geriatrics
Comparison of the intervention effect of combination of pneumonia vaccine and influenza vaccine on respiratory diseases in the elderly patients with chronic diseases
FENG Xiao-lei, LI Li, ZHU Mei-yu
Practical Geriatrics . 2021, (12): 1284 -1287 .  DOI: 10.3969/j.issn.1003-9198.2021.12.019