The difference between the two mutant strains in Shenzhen and Tianjin →

Shenzhen's "0107" epidemic disposal has entered the 6th day, and the details and trends of the epidemic have all touched the heartstrings of the citizens. It is worth noting that since the outbreak of the epidemic in Shenzhen, a familiar and unfamiliar term has been overwhelmingly involved in the daily life of Shenzhen residents. Its name is Delta Poison Strain.

Compared with the Delta strain, what is the difference between the Olmi kerong strain that Tianjin is resisting?

· Delta strain: high viral load, fast viral replication, high incidence of "breakthrough infection", and high risk of repeated infection.

In July 2021, researchers from the Guangdong Provincial Center for Disease Control and Prevention in China and other institutions published a preprint paper on the Medical Papers Archive Network that the average time for people infected with Delta strains from exposure to the virus environment to the first positive nucleic acid test result was 4 days, while the average time for the original strain was 6 days, indicating that the Delta strain replicated faster. In addition, the first detection of viral loads in a Delta strain infected person was more than 1200 times higher than that of the original strain infected, suggesting that the Delta strain was more contagious.

A team of researchers at Houston Methodist Hospital in the United States, which sequenced and recorded mutations of almost all COVID-19 cases in the hospital system, found that since March 2021, about 17% of cases of infection with Delta strains have occurred in vaccinated populations, and the incidence of "breakthrough infection" of Delta strains is almost 3 times that of all other variants combined.

· Omikejun strain: highly contagious, high immune escape and relatively low toxicity.

Relatively low toxicity refers to the rate at which it multiplies in the lower respiratory tract, that is, the lungs, and its ability to bind to lung cells is weaker than before, but it does not mean that it will only infect the upper respiratory tract. Compared with the influenza virus, the danger of the Omikeron variant cannot be ignored.

Compared with Delta, the vaccine has a certain decrease in the protective efficacy of Themi kerong; internally, the duplication ability of the upper respiratory tract of the Omilon is stronger than that of Delta, both of which determine that the Omilon is more contagious than the Delta.

· Watch out! To sum up

Delta strain

VS

Omikejung strain

● Contagious: Omikron is stronger than Delta

● Pathogenicity: Omiqueron is lower than Delta

● Communication: Amiqueron is stronger than Delta

● Vaccine breakthrough ability: Omi kerong is stronger than Delta

● Severe illness rate: Omiqueron is lower than Delta

In addition, on 8 January, two new indigenous cases in Tianjin were confirmed as infection with the Aomi Kerong variant. From 7 o'clock on the 9th, Tianjin launched nucleic acid testing for all employees. On the 10th, Anyang City, Henan Province, confirmed that the two cases previously found in the local area were infected with the Aomi Kerong variant, which belonged to the same transmission chain as the epidemic in Tianjin.

Experts from the Chinese Center for Disease Control and Prevention interviewed said that Aomi Kerong carries a large number of spike protein mutations, which may lead to increased immunity to evade vaccines. However, some studies have found that people who have been vaccinated against COVID-19 or have been infected with COVID-19 in the past 6 months still have more T cells in their bodies that form a second line of defense, which can deter Omiljung and protect the body from severe illness.

The above experts said that the study shows that after the inactivated new crown vaccine is injected, the titer of the antibody rises rapidly and is maintained at a high level, which helps to better prevent the mutated strain. Compared with other strains, Omiqueron makes the vaccine more effective, so it is particularly necessary to give a booster injection.

Zhang Wenhong believes that the reason why some countries have "broken through" this wave of the epidemic and the case fatality rate is controlled at a low level is mainly due to the high covid-19 vaccination rate. The role of vaccines in the prevention and control of the new crown epidemic cannot be underestimated.

Experts from the Chinese Center for Disease Control and Prevention said that wearing masks is still an effective way to block the spread of the virus, and the same applies to Omi kerong. In addition, it is necessary to wash hands frequently, do indoor ventilation, and do a good job of personal health monitoring.

Source: CCTV