ABSTRACT
Introduction: To understand the effects of COVID-19 vaccines it would be essential to have knowledge about the effects of the disease during the time that vaccines were unavailable. Hence, we tracked the clinical outcomes of Iranian COVID-19 patients during Feb 19th till May 1st 2020 by a longitudinal follow-up study of patients discharged from a university hospital in Iran.
ABSTRACT
There is a strong consensus globally that production of an effective vaccine against SARS-CoV-2 is likely the most effective approach to sustainably controlling the COVID-19 pandemic. An unprecedented research effort and global coordination has resulted in a rapid development of vaccine candidates and initiation of trials. In this paper, we review vaccine candidate against COVID-19 and also challenges of vaccination have been explored in different region.