**Note: Adults age 60 years or older who are at increased risk for severe RSV disease include those with chronic medical conditions such as lung diseases (e.g., chronic obstructive pulmonary disease, asthma), cardiovascular diseases (e.g., congestive heart failure, coronary artery disease), neurologic or neuromuscular conditions, kidney disorders, liver disorders, hematologic disorders,糖尿病,以及中等或重度免疫妥协(归因于医疗状况或接受免疫抑制药物或治疗);那些被认为是脆弱的人;那些高龄的人;那些居住在疗养院或其他长期护理机构的人;以及患有其他潜在医疗状况或医疗保健提供者确定的因素的人可能会增加严重呼吸系统疾病的风险。
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