Reporter : Zheng Gusheng
Editor : Ming Xuan
Publisher : New Tang Dynasty Television
Translation, editing : Gan Yung Chyan
/ KUCINTA SETIA
Image : Schematic diagram of the study of the SARS-CoV-2 viral antibodies. (Image by Tumisu from Pixabay)
The China Communist Party claims that its newly developed SARS-CoV-2 vaccine can cause humans to "produce antibodies 100%", and overseas countries are also studying the possibility of "group immunity". However, many studies have shown that these may only be a psychological comfort. According to the latest paper by Chinese scholars, most of the antibodies of the virus can only be maintained for 2 to 3 months.
The research was led by a Chinese research team, whose paper was published in the journal Nature Medicine on 18 June.
The research team conducted a study of 37 symptomatic and asymptomatic patients in Wanzhou District, Chongqing, China. The team analyzed the blood samples of these two groups of people after several weeks of recovery and found that 62.2% of asymptomatic people can produce transient antibodies, and 78.2% of those with symptoms.
However, after 8 weeks, 81.1% of asymptomatic patients experienced antibody decline, and 62.2% of those with symptoms. By the end of the trial, 40% of asymptomatic people had no antibodies detected, and 12.9% of those with symptoms.
In addition, the levels of 18 pro-inflammatory cytokines and anti-inflammatory cytokines in asymptomatic people are also low, which may mean that asymptomatic people have a weak immune response to the virus.
The results of the study showed that regardless of symptomatic or asymptomatic patients, most of their antibodies can only be maintained for 2-3 months. In contrast, antibodies in patients with severe acute respiratory syndrome (SARS) and Middle Eastern respiratory syndrome (MERS) are generally believed to last about 1 year.
The paper emphasizes that although the scale of this study is relatively small, it can be used as a reference for countries in measuring the "immunization passport" policy.
At the same time, a study conducted by scholars from the United States and China also concluded, "The human body is unlikely to produce long-term protective antibodies against SARS-CoV-2."
The number of samples sampled in this study is relatively large. The research team found that at least one quarter of the more than 23,000 tested samples from medical staff in Wuhan had been infected with the virus at a certain stage, but as of April, only 4% had antibodies.
The study has been published on the biomedical preprint website MedRxiv, but has not yet passed peer review.
Prior to this, a large number of fuyang cases after the discharge of infected patients in China and South Korea were reported.
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