Another new variant of the new crown is raging across the United States. According to the latest data monitored by the US Centers for Disease Control and Prevention, in the week ending December 31, 2022, the infection rate of the XBB.1.5 strain nearly doubled from the previous month. XBB, XBB. 1.5 accounted for 44.1% of the total number of infected cases in the United States, making it the number one epidemic strain in the United States. Some American infectious disease experts said that the worst variant currently facing the world may be XBB. At present, more and more people are concerned about whether the XBB.1.5 strain will cause secondary infection? In this regard, Wang Xinyu, deputy director of the Department of Infectious Diseases, Huashan Hospital Affiliated to Fudan University, said that the probability of re-infection mainly depends on two aspects: on the one hand, how much overlap with BA.5 and BF. If the cross-protection effect is reduced, it may cause re-infection; on the other hand, it depends on the level of individual autoantibodies.
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Although everyone knows that in the case of herd immunity, it may only be a matter of time before a new virus strain is brewed, but for the domestic people, what is most worrying now is that after we loosen the control of the epidemic at the end of 2022, we are already in the We have experienced a wave of infections in a very short period of time, and now we are about to clear international customs. Given that we already have BA.5 and BF.7 antibodies, will we be reinfected with the XBB strain in the short term? This is why although experts have repeatedly emphasized that the pathogenicity of XBB is similar to that of the previous strains, everyone is still panicking. After all, according to the immune escape ability of the new strain, it is possible that this strain in China has already been spreading secretly. .
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