A Survey for Promising COVID-19 Vaccines: Issues, Advantages, and new Research Directions

Abstract

The world population facing the outbreak of a dangerous epidemic namely COVID-19 nowadays. This epidemic is considered one of the most dangerous diseases that have spread in this century. The World Health Organization (WHO) has called on all health care sectors and research laboratories to produce an appropriate vaccine to confront this epidemic around the world. Nevertheless, many specialized medical research centers have produced vaccines according to certain criteria in many advanced countries. Many of these vaccines have been approved to vaccinate the infected and the uninfected to counteract the variants versions of this epidemic. Some of these vaccines are showed efficacy against different variants, especially the delta variant. The paper aims to present a survey of the best types of approved vaccines and highlight their advantages and disadvantages and new promising directions. This survey highlighted the top ten vaccines produced and approved globally, to help countries choose the best one according to their characteristics. Therefore, we call people to take the vaccination against this dangerous epidemic to control and prevent its spread.