Health Times reporter Wang Aibing Lin Jing
On the morning of January 10, the Office of the Anyang Municipal COVID-19 Epidemic Prevention and Control Headquarters urgently reminded that the case in Anyang City and the existing local epidemic situation in Jinnan District of Tianjin City belong to the same chain of transmission.
According to the Anyang Municipal Covid-19 Epidemic Prevention and Control Headquarters, on January 8, 2022, Anyang City found 2 cases of positive nucleic acid of the new coronavirus in the active test population. On January 9, the whole genome of the virus was sequenced by the laboratory of the Henan Provincial Center for Disease Control and Prevention, showing that the two local cases infected with the virus were all ba.1 branches of the Aomi Kerong variant, which belonged to the same transmission chain as the existing local epidemic in Jinnan District, Tianjin. Combined with the results of epidemiological investigation and gene sequencing, the source of infection of this epidemic in Anyang City was basically identified as a college student who returned to Tangyin County of Anyang City from Jinnan District of Tianjin City on December 28, 2021.
The Health Times reporter noted that the source of this round of epidemic in Anyang is a college student who returned to Anyang City from Jinnan District of Tianjin on December 28, 2021, and this time node is before New Year's Day.
Nucleic acid testing is performed in Anyang. Pictured from Anyang Rong Media
It is speculated that the epidemic had spread in secret in Tianjin at the end of December
A disease control expert who did not want to be named revealed to the Health Times reporter, "If the whereabouts of the people returning from Tianjin in Anyang City are very clear and indeed returned from Tianjin, it is a very directional information, and we have also obtained relevant information." ”
Li Tong, chief physician of the Department of Infectious Diseases of Beijing You'an Hospital, once said, "Through this official news, it can basically be speculated that this round of epidemic has been secretly transmitted in Tianjin at the end of December, and there may still be many cases in Tianjin that have not yet been found, and it may have spilled over to other regions in the community, and Henan Province and Hebei Province adjacent to Tianjin do not rule out that there are infected people from Tianjin, and it is necessary to continue to screen relevant personnel." ”
"If it is clear that the source of infection in this outbreak in Anyang City is a college student who returned to Anyang City from Jinnan District of Tianjin City on December 28, 2021, then it is speculated that the infection case in Jinnan District of Tianjin City may have been infected before New Year's Day." Qiao Shubin, director of the Department of Respiratory and Critical Care Medicine at Beijing Fengtai Hospital of Integrated Traditional Chinese and Western Medicine, believes that "this also shows that the BA.1 branch of the Aomi Kerong variant may have a longer incubation period."
Li Tong once suggested, "Now we should cooperate with the requirements of various localities, from December 25 onwards, from Tianjin or have been to Tianjin to take the initiative to screen for the new crown." ”
Aomi Kerong mainly causes asymptomatic or mild infections, which is a difficult point in epidemic prevention and control
On January 9, Wu Zunyou, chief expert of epidemiology at the Chinese Center for Disease Control and Prevention, said in an interview with Tianmu News that The main cause of Aomi Kerong is asymptomatic or mild infection, which may be the difficulty of epidemic prevention and control.
He called on everyone to pay special attention to these two points in the prevention of Aomi Kerong, "First, because the symptoms of Omi kerong are milder, it is more difficult to find and easier to spread, which is a good thing for individual patients, but it is more difficult for group prevention, which is a major challenge, which has been ignored in previous news reports or discussions." The second point is that Omilon makes the vaccine more effective than other mutant strains, so it is particularly necessary to inject stronger. ”
