Medical experts are warning that the A/H1N1 flu has entered a period of high frequency and easy transmission. And with fresh cases of pigs infected by the virus in Hong Kong and Taiwan, experts say the possibility that the virus will mutate is growing.

Recent monitoring has found several cases of pigs, cats and dogs infected by the human A/H1N1 flu virus. Experts now fear that close contact between people and animals will increase the danger of mutation. China's Ministry of Health reported 30 fatal cases on the mainland as of Monday, out of nearly 60 thousand confirmed cases. It said the increase in infections will inevitably result in additional severe cases. Experts call for a timely response each time a case is confirmed, to prevent the illness from worsening.

Dr. Zhong Nanshan, head of Chinese Medical Association, said, "Because when the virus harms the lungs, there is a high possibility of breathing difficulty. It is different from the usual pneumonia. And there will be great difficulty treating such patients, even though they are young and healthy. The reason for this is unclear yet, but what we can do is get vaccinated, and go to the hospital as soon as possible when suffering from a continuous fever. "

(CCTV November 11, 2009)