4 reasons why 40% of those infected do not have symptoms of Corona
The Centers for Disease Control and Prevention confirmed that more than 40% of Corona patients do not show any symptoms, and in some gatherings such as prisons, 94% of the infected people did not show symptoms of the virus, and the researchers attributed this to 4 reasons.
According to the Washington Post, which published the study, T cells, a type of white blood cell that generally provides longer-lasting immunity than antibodies, may be the key to understanding this resistance and not showing symptoms of the disease.
One research group found that among the uninfected blood samples that were donated to the blood bank between 2015 and 2018, 40-60% of these samples were identified with the Corona virus, indicating that some people may have an immune response based on memory. Other less effective corona viruses.
In a study conducted in the Netherlands, T cells interacted with the virus in 20% of samples, in Germany 34%, and in Singapore 50%.
The researchers assumed that this difference may be due to previous exposure to similar pathogens, and they indicated that perhaps, fortunately, the Corona virus is part of a large family of viruses, two of them are deadly, SARS and Corona virus, and four other types of Corona virus, which cause colds, It is widespread every year but usually causes only mild symptoms.
The second reason is childhood vaccinations, and the Mayo Clinic research group is studying whether vaccines obtained in the childhood period to prevent other diseases can protect against the virus, as happened with previous epidemics.
The group found that there are about seven types of vaccines that were given to people at the age of one, two or five years, that can reduce infection with the Corona virus, such as pneumonia and polio vaccines.
As for the third reason, scientists have noted that children with asthma and allergies do not seem to be at great risk of developing serious cases of the Corona virus.
One theory said that these children have fewer ACE2 receptors, which is the protein that the virus attaches to before it multiplies inside the body, and without these receptors, the virus's chance of causing harm can be reduced, which means that the sensitivity may provide protection in this case.
As for the fourth reason, they are masks, and researchers believe that wearing masks as a preventive measure can contribute to reducing the impact of the Corona virus and its symptoms on a person.
The researchers demonstrated the validity of this belief through a comparison between two cruise ships, the "Diamond Princess" and the Argentine ship bound for Antarctica, as masks were not used when the epidemic broke out on board the first ship, so the percentage of injuries without symptoms was about 47%. On the other ship, in which N95 masks were distributed to all who were on the ship, the proportion of asymptomatic injuries was about 81%.
It is noteworthy that the number of those infected with the Kurna virus since its outbreak began last December has exceeded 20 million around the world, more than a quarter of them in the United States of America alone, according to the worldometers website, which monitors the development of the epidemic.
It also killed 733,329 people around the world, including about 163,000 in the US, where the infection curve has witnessed a significant increase since the end of June.