Corona virus still baffles everyone whether it is infected or cured, and the formation of antibodies and permanent immunity from it, but a new joint study between a group of Chinese and American scientists revealed a shocking surprise that humans may never develop immunity against Covid 19.
Their conclusion was based on a study that examined whether hospital workers in Wuhan who were directly exposed to patients infected in the early stage of the outbreak had developed antibodies, as the new killer disease was first detected in the Chinese city late last year, according to a newspaper report. south china morning post.
According to scientists, at least 25% of the tested samples, numbering more than 23,000, may have contracted the virus at some point, but only 4% developed antibodies as of April..
The researchers concluded in research published on the site medRxiv.org However, people are less likely to produce long-term protective antibodies against this virus.
Several efforts are being made to combat the epidemic, assuming that those infected with the Coronavirus will be infected Antibody It protects them from infection again, and these efforts include countries considering issuing “immunity certificates”, more than 100 possible vaccines are under development, and patients who have been cured are encouraged to donate blood for experimental drugs and treatments..
But the new research in Wuhan indicated that not all infected people produced temporary antibodies or long-term antibodies, and antibodies are molecules generated by the immune system to bind to a protein that rises in the virus and stops it from infecting cells.
It can immunoglobulin G, Or IgG , Staying in the immune system of the human body for a long time, and was found in patients with severe SARS 12 years after infection.
But according to the new research led by Wang Shenhuan of Zhongnan Hospital of Wuhan University and scientists from the University of Texas, the study looked at samples from health care workers and public hospital workers in the city and found that 4% of health care workers and 4.6% of hospital staff General have antibodies.
Some people suffer from mild symptoms or do not appear when infection with the coronavirus that causes the Corona virus, and may not realize that they are infected with it, and with the confirmation of the transmission from person to person not confirmed until late January, many doctors and nurses in Wuhan did not wear additional protective equipment For the treatment of patients, which exposed them to infection and fought the virus through their own immune systems, while patients with a confirmed infection, as the symptoms were usually more pronounced, tend to produce more antibodies, according to the researchers, a previous study found that all confirmed cases that They looked at it developed antibodies IgG Two weeks after the disease appeared.
Wang’s team also suggested that more than 10% of people in their study may have lost antibody protection within a month or so, and said, “Our findings have important implications for herd immunity, antibody-based treatments, public health strategies, and vaccine development.” “.
Based on their research, they said that antibody tests may not be sufficient to know if a person is infected, and the presence of antibodies such as IgG Necessarily immune later.
Meanwhile, a separate study by a team at Tsinghua University in Beijing indicated that the more antibodies produced by patients with the Coronavirus, the worse the outcome, as the patient with the strongest response to the antibody died in their study..
They pointed to a phenomenon known as antibody dependent improvement, in which viruses “ride a ride” on an antibody to infect cells that they cannot enter otherwise.
But Ying Song, director of antibody engineering research at Southern Medical University in Guangzhou, said that the Wuhan study should be handled with caution and indicated that most antibody tests were only examined for two antibodies to save time and cost, and that could mean wrong results, saying “There are still many basic things about the coronavirus that we don’t understand.”