The first case of Omicron virus infection was confirmed in Japan. How was this confirmed case infected?

The Japanese man has never been to South Africa, and the possibility of being infected has always remained in South Africa.

202 1,1654381October 9, the first case of Omicron virus infection occurred in South Africa, and less than a month later, there were cases of Omicron infection in many countries around the world. Most of these cases have been to or passed through South Africa, and there are also some close contacts.

First, Japan passed South Africa for the first time.

2021165438+1On October 30th, Japanese TV reported that a 30-year-old man who entered Namibia on the 28th was tested positive by COVID-19. After sequencing the gene of the man's physical examination, Japanese virus graduate students confirmed that it was Omicron strain, which was the first case of Omicron strain infection in Japan. Like most cases of Omicron, this case occurred in South Africa, and the man had fever symptoms when he was tested.

Second, the confirmed cases in Japan were infected in South Africa.

The man mentioned above has been in South Africa and is an immigrant, so it is very likely that he was infected with Omicron strain in South Africa and was detected when he entered the country. On June 30th 165438+, Japan began to implement the plan to ban foreigners from entering the country, but local people and people with re-entry permits are not within the scope of the ban, so it is still possible to import overseas cases. However, Japan's strict prevention of entry points can find cases in time and isolate them immediately, which can effectively prevent domestic infection risks. At present, the man has been isolated, and both his family members are negative and are also under isolation observation.

Third, countries have stepped up the investigation of immigrants.

It is precisely because many confirmed cases of Omicron are directly or indirectly related to South Africa that countries have taken preventive measures at entry points, especially South African immigrants, which have attracted more attention. Even if a case is found at the entry point, it can be isolated in time to prevent the virus from entering the country.