COVID-19 is the worst pandemic faced by World in modern times. Since its outbreak at China at start of 2020, it is spreading and spreading all over the World. Every country of World has been effected by it. It has caused the large number of deaths all over the World. All country of World adopted almost the similar approach to curb the outspread of pandemic. The key tool has been "lock down". At intial stages, all countries have imposed full lockdown. But with time, due to financial problems, countries relaxed the lockdown and lateron opted for smart lockdown. Developed countries of World maintained complete lockdown for long duration. Origin of the coronavirus that is China, has controlled the spread of COVID-19. New Zealand is the country that has fully defeated the pandemic. Most infected countries like Italy, Spain & Iran have also achieved the decline in outspread of coronavirus. But what wrong happened for United States of America. United States of America is the mo...