Although she believed that she had a good chance of recovering,the doctor said that few, if any,could come back to normal after getting this disease.
相当于：if any people got this disease,few could come back...
也就是说这个其实是if从句的一种省略模式.只要意思合适就行.
医生说：如果有人得了这个病,几乎没有人可以复原
如：
What action, if any, do you take?若有的话,你会采取什么措施?
这里的if any=if you take any action