COVID-19 Vaccine: Where Are We?

Jyoti Sharma & Sanjeev Kumar Varshney


Development phases (Clinical Trials) of Vaccines


With the entire world struggling with the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), all hopes are now on researchers, industries, policymakers, and regulatory bodies worldwide working to find a vaccine.

According to the World Health Organisation (WHO), there are around 200 candidate vaccines in different development phases. While Russia has already announced authorisation for the production of Sputnik vaccine, a few other fast-tracked vaccines could come to the market anywhere from the end of 2020 to the middle of 2021. For administering this vaccine to citizens across the world, the candidate vaccines have to go through a rigorous cycle of pre-clinical and clinical trials. Earlier data showed that there is roughly a 7 per cent and 20 per cent chance of succeeding for those at the pre-clinical and clinical trial stages, respectively. The vaccines are also being tested at different temperatures as per different climatic more