prophylaxis and treatment

例句：

1. 1. Prophylaxis is the practiceof preventing disease before it occurs.
   预防是预防疾病在发生之前。
2. 2. Thedoctor prescribed a prophylactic medication for her toprevent infection.
   医生给她开了一种预防药物，以防止感染。
3. 3. In the event ofan outbreak, prophylaxis measuresare taken to prevent further spread.
   如果爆发，将采取预防措施以防止进一步传播。