While mankind is still dealing with the COVID-19 pandemic, a case of monkeypox virus (MPXV) has been reported to the WHO on May 7, 2022. Monkeypox is a viral zoonotic disease that has been a public health threat, particularly in Africa. However, it has recently expanded to other parts of the world, so it may soon become a global issue. Thus, the current work was planned and then designed a multi-epitope vaccine against MPXV utilizing the cell surface-binding protein as a target in order to develop a novel and safe vaccine that can evoke the desirable immunological response. The proposed MHC-I, MHC-II, and B-cell epitopes were selected to design multi-epitope vaccine constructs linked with suitable linkers in combination with different adjuvants to enhance the immune responses for the vaccine constructs. The proposed vaccine was composed of 275 amino acids and was shown to be antigenic in Vaxijen server (0.5311) and non-allergenic in AllerTop server. The 3D structure of the designed vaccine was predicted, refined and validated by various in silico tools to assess the stability of the vaccine. Moreover, the solubility of the vaccine construct was found greater than the average solubility provided by protein-Sol server which indicating the solubility of the vaccine construct. Additionally, the most promising epitopes bound to MHC I and MHC II alleles were found having good binding affinities with low energies ranging between − 7.0 and − 8.6 kcal/mol. According to the immunological simulation research, the vaccine was found to elicit a particular immune reaction against the monkeypox virus. Finally, the molecular dynamic study shows that the designed vaccine is stable with minimum RMSF against MHC I allele. We conclude from our research that the cell surface-binding protein is one of the primary proteins involved in MPXV pathogenesis. As a result, our study will aid in the development of appropriate therapeutics and prompt the development of future vaccines against MPXV.

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Background: The COVID-19 pandemic is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). At the time of writing, neither a cure nor a vaccine has been approved by the World health organization (WHO)  for this disease. Given the fact that the severe acute respiratory syndrome coronavirus  (SARS) and Middle East Respiratory Syndrome (MERS) viruses have a genetic sequencing similar to SARS-CoV-2, and since the use of convalescent plasma therapy (CP) has proved its efficacy in SARS and MERS virus infections, researchers are starting to focus more on it as a possible therapy for the COVID-19 disease. The main objective of this rapid review is to report and summarize the published evidence on the role of convalescent plasma therapy in the current COVID-19 pandemic. Method: The PICO method was used to establish the review question. Moreover, papers were gathered from PubMed and Google scholar, critically appraised for the best evidence. Piersons 5-component scheme was used to check the quality of the review papers. Results: After website screening: 10 papers in PubMed and 6 papers from Google scholars were retrieved. There were encouraging reports regarding the uses of CP in the previous viral outbreaks likes SARS and Ebola, yet there is still a doubt on the efficacy of this mode of therapy in the current COVID-19 pandemic. Conclusion: CP is a very promising treatment approach for COVID-19 patients; however, more clinical trials are required to validate the effectiveness of this therapy. Keywords: COVID-19, convalescent plasma therapy, SARS-CoV-2, therapy.

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