**5. COVID-19 vaccines at glance**

From February to June 2021, at least seven different vaccines across three platforms have been rolled out in countries [8–10]. Vulnerable populations in all countries are the highest priority for vaccination. At the same time, more than 200 additional vaccine candidates are in development, of which more than 60


**Table 2.**

*Covid-19 vaccines rolled out in different countries for vaccination.*

#### *COVID-19 Vaccine: A Way Out of Crisis DOI: http://dx.doi.org/10.5772/intechopen.98736*

are in clinical development. COVAX is part of the ACT Accelerator, which WHO launched with partners in 2020. Some of the vaccines which have been rolled out are described in **Table 2**.
