The headway of antiviral treatment are exciting, however the associated difficulties increase. So it needs more work to develop new drug which are simple, effective and low toxic.

尽管目前的抗病毒治疗进展令人鼓舞，但是联合抗病毒治疗的困难也不断出现，仍需要做更多的工作，以便今后能开发出简单、有效与毒性低的药物。