We started our seminar with overview of the story of COVID-19 Pandemic, the characteristics of the virus, and the family of Corona viruses.<br />The COVID-19 disease is briefly studied, while its clinical features, the ways of transmission, and possible complications are presented in details.<br /><br />Key messages<br />The ongoing global COVID-19 pandemic continues to cause millions of infections and over a million deaths across the world.<br />The vaccine to prevent COVID-19 is the most effective way to control the pandemic.<br />Scientists across the world have worked to develop vaccines which have then been rigorously tested for safety and efficacy.<br />It is crucial that the COVID-19 vaccine is safely and effectively delivered to as many of those eligible as possible.<br />The types of COVID-19 vaccines are carefully explained.<br />Herd Immunity : is the protection gained by a community when vaccination rates are very high usually over 85%.<br />They reduce epidemics (local or national infection spreading rapidly)<br />