Immunity to coronavirus can last for years

Is there immunity against coronavirus after COVID-19? This is one of the most important questions in the world today, as vaccination against COVID-19 will be effective only if the answer is yes. The results of the study of blood samples from patients who recovered from COVID-19 indicate a strong and long-lasting immunity. How long does immunity to COVID-19 last?

The results of the new study indicate that years, and maybe decades. 8 months after coronavirus pneumonia, most of the examined patients still had immunity to SARS-CoV-2. The results of this study have so far been published only online, but are very encouraging, especially given the effectiveness of vaccination and the chances of returning to normal life. Examination of people who have recovered from SARS, a disease caused by another coronavirus show that important immune cells that are responsible for immunity to the infection are detected even 17 years after the disease.

Researchers at the University of Washington, led by immunologist Marion Pepper, have previously shown that certain “memory” cells that are produced after coronavirus infection remain in the body for at least 3 months. Another recently published study suggests that convalescents after COVID-19 are characterized by the presence of powerful natural killer cells even if no antibodies are detected in the blood.

Akiko Iwasaki, an immunologist at Yale University in the United States, said she was not surprised that the immunity to the virus persisted for many months, as it should naturally be after an infectious disease. However, it is known that in some infected individuals, immunity to SARS-CoV-2 was short-lived after recovery, what scientists explain by the fact that different patients received different amounts of the virus, and believe that these features can be overcome by vaccination.

Other immunologists explain that the level of antibodies to the virus usually decreases over time, but these are the immune “memory” cells that remain and, if necessary, trigger an immune response to protect against re-infection.   Based on: https://www.nytimes.com/2020/11/17/health/coronavirus-immunity.html

Specialists of the Institute of Cell Therapy carefully monitor the latest advances in medicine in the treatment of COVID-19 and ways to prevent this dangerous disease. Doctors and scientists at the Institute of Cell Therapy have also developed a method of treating COVID-19 using umbilical cord and placental mesenchymal stem cells and a rehabilitation program after COVID.