一型糖尿病（T1D）是一种自身免疫系统缺陷导致的疾病。
Type 1 diabetes mellitus (T1D) is an immune-mediated disease.
巨细胞病毒是一种病毒，它可导致伴免疫系统缺陷的人们(包括器官移植患者)患严重疾病，例如肺炎或大肠炎。
CMV is a virus that can cause severe disease such as pneumonia or colitis in people with weakened immune systems, including organ transplant patients.
对健康人自然没什么，佩斯博士强调，但是对于那些免疫系统缺陷或者那些易患肺部疾病的人群——就是老人——最好做好预防工作。
Not for healthy people, insists Dr Pace, but those with a compromised immune system or who are at risk of pulmonary diseases—the elderly, say—may want to take precautions.
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