COVID-19 Vaccine Route in Thailand and Post-Vaccination Immunity against the Mutated Virus

Abstract

Vaccination is considered a crucial key to terminate the widespread outbreak of the COVID-19 virus. The Ministry of Public Health has allocated big amount of funds to purchase COVID-19 vaccines, allowing Thai people to access the vaccine rapidly. Therefore, it was the source of the COVID-19 vaccine distribution in Thailand. The chronological sequence of COVID-19 vaccines used in Thailand began with CoronaVac (SV), Covid-19 vaccine AstraZeneca (AZ), Covilo (SP), Comirnaty (Pf), Spikevax, and Covovax, respectively. Studying post-vaccine immunity in volunteers who received the primary series doses of both homologous and heterologous vaccines, including the third booster dose can provide information that can be used to consider administering the COVID-19 vaccine to the population living in Thailand. The main objective of the vaccination program is to create sufficient immunity, reduce severity, and minimize deaths from the continually mutating SARS-CoV-2 virus. However, it should be reminded that even though vaccination is crucial in protecting against COVID-19, personal hygiene, including wearing masks, maintaining distance, and regular hand sanitizing, are eqaully important to reduce the risk of the corona virus infection.