DENG Ying A: Influenza A H1N1 influenza viruses mutate sure, but the virus mutation caused by changes in virulence of the virus is not certain, it may be enhanced, unchanged or reduced.

• 邓瑛答：甲型H1N1流感病毒肯定会发生变异，但病毒变异所导致病毒毒力的改变却不是确定的，它可能增强、不变或减弱。