Russia has become the first country to approve a coronavirus vaccine, a move that has been met with skepticism due to the small sample the vaccine was trialed on. Michael Head, senior research fellow in global health at the University of Southampton, highlighted the vaccine's effectiveness and safety concerns. Dr. Amesh Adalja, a senior scholar at the Johns Hopkins University's Center for Health Security, expressed his concern that if something goes wrong with Russia's vaccine, it may undermine public confidence in any COVID-19 vaccine.