A follow-up study conducted by Chinese scientists in Wuhan, Hubei Province, shows that 40 percent of local COVID-19 patients are COVID-19 neutral antibodies that can effectively survive for co-infection. at least nine months.
The study was publicly published in the Lancet on Friday, revealing dynamic changes of serum antibodies in COVID-19 patients, which is also helpful in evaluating the efficacy of vaccine protection.
Wang Chen, lead author of the paper and president of the Chinese Academy of Medical Sciences and Peking Union Medical College, said it is crucial to assess the proportion of people vaccinated in order to work out effective prevention and control strategies. to reduce future accidental risk.
The study is the first longitudinal study of serum epidemiology conducted in Wuhan. It is also a global observation with the longest-running follow-up serum epidemiology study with the most follow-up visits, Xinhua News Agency said.
The study was conducted jointly by researchers from China Academy of Medical Sciences, Peking Union Medical College, CDC China and local CDC Wuhan.
After Wuhan completed its lock in April 2020, researchers sampled 9,542 residents from 3,556 households in all 13 districts of Wuhan, then made follow-up visits in June and October to December.
The study also showed that the positive antibody conversion rate of the population in Wuhan was at 6.9 percent, indicating that only a small proportion of people in Wuhan were infected.
Previous studies have shown that the number of infections measured by the advanced level of serum antibodies is much higher than the rate of diagnosed cases of COVID-19. The main reason is that most infectious people are asymptomatic and patients with mild cases, and may not have been medically tested or sought.
Ren Lili, co-author of the paper and a researcher at the Institute of Pathogenic Biology at the Chinese Academy of Medical Sciences and Peking Union Medical College, said the intensity of antibodies in asymptomatic patients was lower than those in patients with symptoms. The result is valuable for future prevention and precision control.
Professor Richard Strugnell of the Doherty Institute, Australia, said on the research that the findings confirm success in controlling the Wuhan revolution of COVID-19 at a time when testing, detection and handling facilities were much less developed, the media reported.