mRNA SARS-CoV2 Specific and Childhood Vaccines against Covid-19 Pandemic

Abstract

The coronavirus disease 2019 (Covid-19) pandemic has been challenging the entire world since early 2020. Due to the fact that there is no universally available treatment method along with the disease’s fast transmission from human to human, specific vaccine development efforts have got a great attention. Particularly mRNA-based severe acute respiratory syndrome coronavirus 2 (SARS-CoV2) specific vaccines are administrated to individuals worldwide to combat against Covid-19 infection. Even though two dose mRNA vaccination provides immunity against ancestral and aggressive variants of SARS-CoV2 infections, rare detrimental short-time side effects and no-data availability on long-term possible side-effects along with unpredictable vaccination regime bring hesitancy against the vaccines. Besides, the vaccination regime is still under debate among the scientist as that whether pre-infected individuals require further vaccination and what should be the ideal vaccination dose. In addition to mRNA SARS-CoV2 specific vaccines, recent retrospective, theoretical, clinical, and biochemical studies revealed that trained innate immunity and heterologous T-cells and memory B-cells can be strong alternative to combat against SARS-CoV2 pandemic. In this context, conventional childhood vaccines (e.g., BCG and MMR) are proposed as valuable alternative vaccines against the pandemic with known clinical outcomes and effectivity.