Safety and immunogenicity of vaccines against SARS-CoV-2

The mortality rate estimated by the WHO worldwide for CO-VID-19 has been 5.7%, much higher than other communicable infectious diseases, so it is essential to apply a vaccine to the population to reduce the viral spread, according to the WHO there are 23 projects in clinical phase stage III, such as vaccines: ChadOx1, nCov-19, Gam-COVID-Vac, CoronaVac that show promising results in research published by The Lancet Infection Diseases journal, for which we consider correlating the three vaccines and determining which is safer, generates greater im-munogenicity and less reactogenicity in volunteer participants, for which we conducted a review bibliography and a meta-anal-ysis of high impact scientific articles, concluding that the three vaccines generate a rapid and intense immune response against SARS-CoV-2, neutralizing antibodies had elevated titers in participants at 28 days, who increased and remained stable with a second dose, although each of them have been tested in different numbers and populations, applying recombinant adenovi-ral vectors and chemically inactivated virions with adjuvant and placebo for which they are totally different but with the same purpose to generate memory antibodies against SARS-CoV-2. Copyright © 2021, Venezuelan Society of Pharmacology and Clinical and Therapeutic Pharmacology. All rights reserved.