International Journal of Preventive Medicine (Int J Prev Med)2008-7802149202310045355ENPrivate Academic Consultant, Bangkok, ThailandDepartment of Biological Science, Joseph Ayobabalola University, Ikeji‑ Arakeji, Nigeria, 2Depatment of Community Medicine, Dr. DY Patil University, Pune, India20231004<p>Dear Editor, COVID‑19 is still a global emergency with no effective treatment.[1] Vaccination is the best option for managing the spread of this disease.[2] COVID‑19 vaccination is now universally acknowledged as an effective primary COVID‑19 preventive strategy. Traditionally, two vaccine doses are necessary for full vaccination. After complete vaccination, immunity levels may diminish, necessitating the use of self‑protective behavior. When there is a new developing variant and a potential decline in antibodies after completion of routine immunization, several experts recommend using an additional booster dose of the COVID‑19 vaccine.[3,4] In general, vaccine effectiveness against COVID‑19 infection wanes significantly 5‑8 months after completion of immunization, which is why COVID‑19 vaccine booster injections are required.</p><p><span class="ej-journal-name" style="box-sizing: inherit; font-style: italic; font-weight: 500; color: #3b3030; font-family: 'Fira Sans', sans-serif; font-size: 14px; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">International Journal of Preventive Medicine<span> </span></span><span id="ej-journal-date-volume-issue-pg" style="box-sizing: inherit; color: #3b3030; font-family: 'Fira Sans', sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><a style="box-sizing: border-box; color: #005b92; text-decoration: none; background-color: transparent; cursor: pointer; outline: 0px;" href="https://journals.lww.com/ijom/toc/2023/09280">14(1):112, September 2023.</a></span><span style="box-sizing: inherit; color: #3b3030; font-family: 'Fira Sans', sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span> </span>|<span> </span></span><span class="ej-journal-doi" style="box-sizing: inherit; font-style: italic; font-weight: 500; color: #3b3030; font-family: 'Fira Sans', sans-serif; font-size: 14px; font-variant-ligatures: normal; font-variant-caps: normal; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">DOI:<span> </span></span><span style="color: #3b3030; font-family: 'Fira Sans', sans-serif; font-size: 14px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: #ffffff; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">10.4103/ijpvm.ijpvm_146_22</span></p><p> </p><p>Corresponding Author: <span class="fontstyle0">Dr. Rujittika Mungmunpuntipantip</span></p><p>E‑mail: <span class="fontstyle0">rujittika@gmail.com</span> </p><p>You can also search for this author in: <a title="PubMed" href="https://pubmed.ncbi.nlm.nih.gov/?term=%28%28Rujittika+Mungmunpuntipantip%5BAuthor%5D+AND+Private+Academic+Consultant%5BAffiliation%5D%29%29">PubMed</a>  <a title="Google Scholar" href="https://scholar.google.com/scholar?hl=en&amp;as_sdt=0%2C5&amp;q=Rujittika+Mungmunpuntipantip&amp;btnG=">Google Scholar</a></p>http://ijpm.mui.ac.ir/index.php/ijpm/article/view/2868http://ijpm.mui.ac.ir/index.php/ijpm/article/download/2868/717718691