COVID-19 Vaccines in Pakistan: Efficacy, Adverse Effects and Availability

Abstract

In this review article, we aim to document the efficacy, adverse effects, mode of action, required doses, and availability of the major vaccines available in Pakistan till 20 May 2021. We reviewed all available literature on COVID-19 vaccines in PubMed and Google scholar. We also reviewed articles from grey literature. Currently, Pfizer–BioNTech and Moderna, Sinopharm (China), Sputnik V (Russia), CoronaVac (popularly known as Sinovac) (China), Cansino, and Vaxzevria vaccines have been authorized for emergency use in several countries. Pakistan has sanctioned the use of all the aforementioned vaccines except Pfizer and Moderna. As per their efficacy, Pfizer and Moderna have been found most effective among all the vaccines with 95% effectiveness, while the Vaxzevria, Sputnik V, Sinopharm, and Cansino have shown 70%, 91.6%, 79.34%, and 90% effectiveness, respectively. All the vaccines have shown milder side effects like headache, fever, and pain on injection sites. To curb the pandemic, more clinical trials are being conducted throughout the world. Importantly public awareness is warranted to achieve the target of vaccinating a large population.