A Review of Humoral and Cellular Immune Responses to SARS-CoV-2 Vaccination Following Solid Organ Transplantation.

The introduction of vaccines preventing a severe course of COVID-19 disease is particularly important in immunocompromised patients, among whom organ recipients and patients awaiting transplantation constitute a large group. The article is a critical review of 68 recent publications on the impact of the SARS-CoV-2 pandemic on transplantology worldwide. The study discusses research results concerning various aspects of SARS-CoV-2 vaccination in transplant patients; it also lists important factors influencing vaccination effectiveness. A suboptimal immune response to 2 doses of vaccine in this group of patients is a major challenge prompting further research. Therefore, this review aims to provide an update on the humoral and cellular immune responses to SARS-CoV-2 vaccination following solid organ transplantation.

Effects of the COVID-19 Pandemic on Solid Organ Transplantation During 2020 in Poland Compared with Countries in Western Europe, Asia, and North America: A Review.

The coronavirus disease 2019 (COVID-19) pandemic, due to infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which began in March 2020, affected organ donor acceptance and rates of heart, lung, kidney, and liver transplants worldwide. According to data reported to POLTRANSPLANT, the number of solid organ transplants decreased by over 35% and the number of patients enlisted de novo for organ transplantation was reduced to 70% of its pre-COVID-19 volume in Poland. Most transplant centers in Western Europe and the USA have also drastically reduced their activity when compared to the pre-pandemic era. Areas of high SARS-CoV-2 infection incidence, like Italy, Spain, and France, were most affected. Significant decreases in organ donation and number of transplant procedures and increase in waitlist deaths have been noted due to overload of the healthcare system as well as uncertainty of donor SARS-CoV-2 status. Intensive care unit bed shortages and less intensive care resources available for donor management are major factors limiting access to organ procurement. The impact of the COVID-19 outbreak on transplant activities was not so adverse in Asia, as a result of a strategy based on experience gained during a previous SARS pandemic. This review aims to compare the effects of the COVID-19 pandemic on solid organ transplantation during 2020 in Poland with countries in Western Europe, North America, and Asia.

Viruses in transplantology.

The 3 leading causes of death in patients after solid organ transplantation (SOT) include cardiovascular diseases, malignancies, and infections. According to our current understanding, the latter play the key role in the pathogenesis of atherosclerosis. Similarly, infections (mainly viral) are implicated in the pathogenesis of at least 20% of known neoplasms. In other words, the implications of acute and chronic infectious diseases in modern medicine, not only transplantology, are significant and ever­increasing. Immunosuppressive treatment impairs the immune function, which renders the patient more susceptible to infections. Furthermore, treatment of infections in immunocompromised patients poses a challenge and SOT. The current publication provides a brief summary of the key information provided in 20 lectures on viral infections in patients after SOT delivered during the 9th Practical Transplantology Course in Warsaw, Poland on September 15-16, 2017.