antigenic drift

例句：

1. 1. The study of genetics has shown that the prevalence of certain diseases can be influenced by antigenic drift.
   遗传学研究显示，某些疾病的流行率可能受到抗原漂移的影响。
2. 2. In the context of vaccine development, antigenic drift is a concern because it can lead to theemergence of new strains of viruses.
   在疫苗开发的背景下，抗原漂移是一个担忧，因为它可能导致病毒出现新的变种。
3. 3.The process of antigenic drift is gradual and often goes unnoticed until a significant change in disease prevalence occurs.
   抗原漂移的过程是渐进的，通常在疾病流行率发生显著变化之前不为人所知。