The confirmed case in Sanya is the first time to detect the infected variant. What are the transmission characteristics of this mutant? How to strengthen prevention?

Through epidemiological investigation and virus gene sequencing analysis, it was found that "080 1" virus in Sanya was caused by COVID-19 Omicron mutant strain BA.5. 1.3. This is the first time that this mutant has been found in China. At present, a mutant strain BA.5. 1 from Omicron is prevalent in Viet Nam and Taiwan Province Province of China around Hainan Province, which is the most concerned mutant strain in the world in recent years and has rapidly become the main epidemic strain in Europe and America. According to the comprehensive analysis of experts, this round of virus has nothing to do with the previous viruses in Hainan Province, and it was not introduced by domestic and foreign tourists.

This round of virus was introduced from abroad, so it is very likely that the fishing boats entering Yazhou central fishing port in Sanya traded with overseas fishermen, imported fish through fishermen's recessive infection or virus pollution, and then spread in Yazhou central fishing port for a period of time. At present, fishing is closed, but the fishing boats entering the central fishing port have related trading activities. Earlier, it was reported in China, Fujian and other coastal areas that fishing boats and fishermen imported fish into COVID-19 after working at sea.

Up to now, the infected people in this round of virus discovery report are basically related to Yazhou central fishing port, and the transmission chain is basically clear, which indirectly indicates that the central fishing port is the origin and input place of the virus. The COVID-19 Omicron mutant strain BA.5. 1.3, which caused this round of virus, is highly contagious, spreads quickly and is invisible. It is suggested that the public should pay attention to the high school risk areas related to virus release, especially those who have a history of exposure or residence in the central fishing port since July 24 should report to their communities as soon as possible, and cooperate with the implementation of prevention and control requirements such as control and nucleic acid detection as required.

I read in the news that this mutation of BA.5. 1.3 is very rare in Asia, and only Japan and Israel have found individual reports. This is a little strange. At present, Hainan is a closed fishing season, and fishing boats must issue certificates for justified reasons, and they need to issue certification materials to marine police, agricultural and rural bureau, fishery administration and other institutions. I thought the first person to be found went out to sea privately and bought aquatic products with fishermen from neighboring countries such as Vietnam. Now it seems that it is not necessarily so simple.

At present, the situation of virus prevention and control is complicated and severe, and the overall virus is highly concentrated and frequent, which reflects that there are still big loopholes in virus prevention and control of fishermen's fishing boats, which brings great risks to China's dynamic zero clearing work. The whole country, especially the coastal cities, should profoundly learn from Sanya's lessons, draw inferences from others, check for leaks and fill gaps, and do a good job in virus prevention and control.

Fishermen and fishing boats in China should not go out to sea unless it is necessary. If it is really necessary to go to sea, it should apply to the virus prevention and control department at or above the prefecture level for approval in advance, and go to sea with a 24-hour nucleic acid negative green code and a health code. After returning to Hong Kong, fishermen's fishing boats will implement closed-loop management throughout the process, with centralized isolation for 7 days and home isolation for 3 days. Only after many rounds of negative nucleic acid tests can the control be lifted, and all kinds of catches will be put into the centralized cold storage in a unified way, and only after many rounds of negative nucleic acid tests can they be purchased. Seafood buyers should give the yellow code first, and at least three negative nucleic acid tests can remove the yellow code.

There is no other way to strengthen the detection in coastal areas. Since the coastal inspection, we must strictly monitor it to prevent it from entering the inland, and don't learn from Shanghai and pollute the whole country. Countries are inseparable. There are too many COVID-19 in the world, and it is difficult for China to achieve zero clearing. Therefore, the question is whether the access conditions should be restored to 7+7, otherwise it is difficult to say that imported cases will not spread in communities and across regions, and will not spread if everyone fails to detect them or the interval is long.

This is a series of BA.5, which is still spreading rapidly. It should be noted that it is slightly harmful to human body, but vaccination should be paid attention to. Generally, three stitches can limit the price difference to more than 80%. Now overseas South Korea or Japan are at risk of proliferation and community proliferation because of the rebound and gathering caused by this. If we want to restrict and control the travel in this area in time, and control and prevent the virus from spreading so fast, we should strengthen these control restrictions across regions.

The biggest feature of this virus strain infection is that the nasopharyngeal swab test of the patient shows that COVID-19's nucleic acid load is particularly high, and the average is nearly twice as high as that of last year's patients. In addition, the disease progressed faster, with an average incubation period of 5.9 days last year and only 3.2 days this time. Most patients with this round of virus are mild or asymptomatic. The severe disease rate was 6.2%, lower than last year. Last year's patients were diagnosed after they went to the hospital with symptoms or had a fever. Most of the patients in this round of virus were found through active screening.

The mutant strain found in India has short incubation period, fast transmission speed and high viral load, so it is necessary to closely monitor the disease changes at an early stage. There is little difference in treatment, mainly active oxygen therapy, symptomatic support therapy and traditional Chinese medicine therapy. In view of the problem that some citizens' health codes become "yellow codes", the press conference also gave an answer. It is understood that in order to stop the spread of COVID-19 virus in time and effectively, Sanya City allocated "yellow codes" to the companions of confirmed cases in time and space according to the requirements of accurate virus prevention and control, and carried out health management according to the management requirements of Hainan health code "yellow codes".

Through the big data analysis of virus prevention and control, the health codes of people who have time and space with confirmed cases have been displayed as "yellow codes". In order to stop the spread of COVID-19 virus in time and effectively, tourists and citizens who are given "yellow code" should cooperate with each other to do a good job in virus prevention and control. 1 time nucleic acid test negative, can automatically turn into "green code". According to experts' comprehensive analysis, the virus was introduced from abroad. It is very likely that the fishing boat entering the central fishing port of Yazhou District, Sanya City traded fish with overseas fishermen, and the fish was infected by fishermen or contaminated by viruses. According to disease control experts, from the current cases, most infected people are related to fishing ports, fishing boats, fishermen and fish markets. The transmission chain is radial with Yazhou central fishing port as the center, and the virus is on the rise, which poses the risk of transmission in cities and communities.

Please raise awareness of risk prevention, fulfill personal responsibility for epidemic prevention, consciously abide by relevant laws and regulations on virus prevention and control, obey community (village) virus prevention and control management, and support and cooperate with the city's virus prevention and control work. People living in the risk area in the past 7 days should take the initiative to report to the community (village) and units, and cooperate with the investigation, isolated medical observation and nucleic acid detection. If serious consequences such as virus transmission are caused by concealment or false reporting, relevant responsibilities will be investigated.