396
We report here on a heretofore undescribed respiratory syncytial virus (RSV) infection in a patient with a long-standing history of refractory CLL that was treated with fludarabine phosphate.
 adverse event: treated 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: treated 