 Complete the following phrase:  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  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, 