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.