The first case of COVID-19 which affected human was recorded in Wuhan City, of China, December 2019.
The virus was named SARS-CoV-2 which is now corona virus.When the Chinese authorities investigated further it was found that those who showed symptoms were were stall owners, market employees and regular visitors.
Corona Virus extended it parameters to all other Asian countries and it kept spreading like wildfire from Asia to Europe and America and also to Africa.
Countries kept researching for the vaccine that can treat the pandemic.
Pfizer-BioNTech vaccine made by BioNTech and Pfizer Inc, Moderna, the University of Oxford (in collaboration with AstraZeneca), and the Gamaleya Institute made a breakthrough ,the vaccine tested positive to combat COVID-19.
Side Effects of Pfizer-BoiNTech Vaccine During Phase III Test
6. Injection Of Site