1. Coronavirus: Sputnik V vaccine rushed out to wary Russians;Rainsford,2020
2. China drugmaker fact-checks claim that its leading COVID vaccine is 97% effective;McGregor;Fortune,2020
3. As U.K. Begins Vaccinations, A Glimpse of Life After Covid;Mueller,2020
4. Canada Authorizes Use Of Pfizer COVID-19 Vaccine;Dwyer,2020
5. DRAFT Landscape of COVID-19 Candidate Vaccines;WHO,2020