Vaccine inequality is the biggest obstacle to curbing the Covid-19 pandemic and accelerating socio-economic recovery in the developing countries. Many people, including myself, living in developing countries, were initially inoculated with the WHO-approved vaccines unwelcome to developed countries, such as Sinovac. Presently, governments in developing countries are offering the third and fourth doses of mRNA vaccines to facilitate cross-border travel. This creates a devastating burden on ongoing Covid-19 vaccination in developing countries, increasing the injustice and inequality between the developed and developing countries. Here, I share my thoughts as a public health specialist while I was receiving the fourth dose of the Covid-19 vaccine to fulfil travel requirements.