A new study explains why some people experience milder symptoms of Covid than others.
COVID-19, the disease produced by SARS-CoV-2, has a wide range of symptoms, just like many other respiratory illnesses. Scientists have now discovered the exact reason why some people have moderate Covid symptoms while others have more severe symptoms.
According to data, the great majority of verified COVID-19 cases are mild, featuring mostly cold-like symptoms to mild pneumonia. Researchers examined blood samples to investigate why some patients experience more severe symptoms than others, in the hopes of better predicting who may experience the most severe symptoms from the novel virus.
A new study has discovered why some people have COVID-19 symptoms that are milder than others.
T cells that “remember” previous contacts with seasonal coronaviruses have been discovered to be the cause of this, according to scientists.
As a result, cells are more suited to mobilize faster to aid in the body’s defense against a COVID-19 infection.
The killer T cells obtained from COVID-19 patients with the worst symptoms showed fewer indicators of having had previous encounters with the common cold-causing COVID-19, according to the study.
The findings could explain why some people, particularly children, appear to be significantly more resistant to COVID-19 infection than others.
It may also aid in predicting which individuals are more likely to experience the most severe symptoms as a result of the novel virus.
The immune system contains a variety of mechanisms for fending off viral invaders and preventing their return.
T cells patrol the body, looking for and eliminating infected cells in order to prevent the virus from replicating. These immune cells can also live for a long time.
Antibodies are easily deceived, according to senior author Dr. Mark Davis, a Stanford University professor of microbiology and immunology and a Howard Hughes Medical Institute scientist.
“Pathogens change swiftly and ‘learn’ to disguise important traits from our antibodies,” he continued.
“However, T cells sense pathogens in a unique way, and they are difficult to deceive.”
Before the COVID-19 epidemic, the researchers examined blood samples from healthy volunteers.
Blood samples were taken from people who had not been infected with COVID-19 but had been exposed to common-cold-causing Covid strains.
Killer T cells targeting SARS-CoV-2 peptides that were shared with other coronaviruses were more likely to proliferate in unexposed persons than killer T cells targeting peptides located specifically on SARS-CoV-2.
“Brinkwire Summary News,” Antibody.