In Singapore, researchers have investigated the role of T-cells and SARS-CoV-2-specific antibodies in asymptomatic individuals suffering from Covid. They have found that asymptomatic people mount an adaptive immune response similar to symptomatic people, stating that T cell response does not appear to be correlated with symptom severity.

The Covid is caused by severe acute respiratory SARS-CoV-2, continues to spread worldwide. Countries such as U.K. and U.S. are trying to reduce the spread of viruses by mass vaccine rollout. Between people characterizing disease factors, severity remains essential.


Due to a large number of asymptomatic cases, SARS-CoV-2 has been, in part, able to spread through populations rapidly. There is a positive correlation between the degree of COVID-specific antibodies and the severity of SARS-CoV-2 symptoms suggested by initial studies, but this is yet to be proven.

Further research was done on this matter, comparing SARS-CoV-2-specific antibody responses and the magnitude of T-cell in asymptomatic and asymptomatic sufferers of the disease. A group of male foreign workers the research team studied who resided in a Singapore dormitory, following up from a group recruited by an earlier study investigating the prevalence of SARS-CoV-2 amongst migrant workers.

T-cells are a specialized type of leukocyte, and they target specific antigens, such as SARS-CoV-2. Against the diseases, T-cells can provide long-term immunity because they remain in the body’s system and against recurring pathogens can be rapidly produced to mount an aggressive response.

In the earlier research, it was suggested that people who suffer from less severe symptoms of SARS-CoV-2 produced T-cells in lower volumes and mount an immune response rely on general antibodies. If this were the case, then asymptomatic people if experiencing future infections of the virus might experience SARS-CoV-2 to a much harsher degree, as they lack the sufficient T-cell memory to deal with the virus rapidly.

The researchers have found out that both set of people had mounted sufficient virus-specific T-cell responses, indistinguishable in magnitude from one another by examining blood plasma in the study group. T-cells produce more significant quantities of IFN-y and IL-2 in asymptomatic people. Cytokines inhibit viral growth, and symptomatic individuals can also coordinate the regulatory and proinflammatory cytokines. In asymptomatic individuals, SARS-CoV-2-specific T-cell levels decline more rapidly, researchers have found out.