It has been reported before
XBB may shorten the immune protection period, and the key population should be protected during the Spring Festival.
According to the news of the press conference of the State Council joint defense and control mechanism held on June 5438+ 10/3, from June 5438+February 1 day, 2022 to June 5438+ 10/2, 2023, the whole country China faces the risk of continuous import of XBB and its branches.
Dong Li, chief physician of the Department of Infectious Diseases of Beijing You 'an Hospital, once told the People's Daily Health Client that the clinical manifestations of XBB virus infection are not very different, and the possibility of causing a large-scale epidemic is relatively low. In the short term, "Yang Kang" population is immune to XBB, but during the Spring Festival, the key population should focus on strengthening protection.
XBB may shorten the protection period of previous infection.
"According to the study of some mutation sites of XBB and its branches, it is considered that XBB is the mutant with the strongest immune escape ability." Dong Li once told the People's Daily Health Client that XBB may shorten the protection period we had obtained before being infected with BA.5 or BF.7, and new mutants may escape the immune barrier established by previous vaccination and natural infection.
"For example, we generally think that the risk of secondary infection within 3-6 months is very small, the protection period of healthy people can reach more than half a year, and people with poor immune function usually think that they can be protected for more than 3 months. However, if XBB is popular, this protection time may be shortened. " Dong Li once explained that this conclusion comes from the observation of some foreign research teams, but how long XBB will shorten the protection period remains to be further studied.
The pathogenicity of XBB virus did not increase significantly.
65438+ 10 13, at the press conference of the joint prevention and control mechanism in the State Council, Cao Chen, a researcher at the Institute of Virology, China CDC, said that the current research data showed that although XBB had strong transmission power, the symptoms after being infected with XBB were similar to those of other Omicron strains, and the pathogenicity was not significantly enhanced.
Dong Li once said: "According to foreign research data, the clinical manifestations of XBB are not significantly different from those of previous strains. Therefore, we believe that even if there is secondary infection, the clinical manifestations may not be much different. " Regarding the rumor that "XBB-infected people are more likely to have some symptoms of cardiovascular and cerebrovascular diseases or diarrhea", Dong Li once said that according to foreign research on XBB epidemic areas, there is no obvious tendency.
Yang Kang is immune to XBB and should be protected during the Spring Festival.
According to the press conference of the State Council Joint Prevention and Control Mechanism, only from 12 in 2022 to 12 in 2023, 1 case of local XBB infection was detected. In the same period, 33 cases of imported XBB and its subfamilies were detected from 20 countries and regions. According to Cao Chen, XBB has not yet become well-known locally.
Dong Li once said: "In a short time, the population of' Yang Kang' will be immune to XBB. Please pay attention not to stay up late during the Spring Festival, avoid fatigue, do not drink too much, and take normal protective measures. "
"For the elderly, people with basic diseases and people who have not been vaccinated, it is still necessary to focus on strengthening protection." Dong Li once stressed that at present, in addition to COVID-19, respiratory infectious diseases such as influenza and syncytial virus are also in the epidemic season, so we should pay attention to the increased risk of infection when visiting relatives and friends.