While the United States slowly begins to administer vaccines, other places in the world are eager to receive their doses. In January of 2021, the United Kingdom finally began to distribute Oxford Astra-Zeneca Around the same time, Moderna ramped up their vaccine production to help supply the U.S government and clinical trials for the only 3 FDA-approved vaccines began. With several variants emerging throughout the world, the safety and effectiveness of the vaccine comes into question. By the end of the month, Johnson &amp; Johnson and Novavax continue their trials to get approval and South Africa suspends the Oxford Astra-Zeneca dose due to the different variants. By the end of February 2021, Israel marked history by being the first country to have half of their population fully vaccinated with Pfizer-BioNTech. And in March 2021, Johnson &amp; Johnson began to send out their vaccines. Unfortunately, the CDC (Centers for Disease Control and Prevention) and FDA had put a pause on Janssen vaccine as 6 cases of cerebral venous sinus thrombosis (blood clot) have been reported. Shortly after, the European Commission (E.C) also put a halt on both J&amp;J and Astra-Zeneca due to similar complications. As more research is done on the development of vaccines, nations across the world continue to find new data to immunize societies effectively, yet safely.