Dai Lianpan, a researcher at the Institute of Microbiology of the Chinese Academy of Sciences, said in an exclusive interview with Science and Technology Daily that if you want to effectively prevent reinfection, it is necessary to re-vaccinate against the new crown vaccine. The coverage of neutralizing antibodies in the body is mainly different, and the people who are infected with 3 time after 1 vaccinations are stimulated by the superposition of the prototype strain and the Omicron subvariant.