Today, the entire world is facing a big medical calamity called COVID-19. It is caused by a member of the β group of coronaviruses named SARS-CoV-2. This virus spreads from person to person through droplets generated during coughing and sneezing from the human body. This outbreak was initially observed in Wuhan, China, and now it has spread from country to country. As per the data collected from Worldometer, about 210 countries and territories were affected by this disease. Globally, as of 25th August 2020, there have been 23,518,343 confirmed cases of COVID-19, including 810,492 deaths. The most affected countries include USA, Brazil, India, Russia and South Africa, having more than 6, 00,000 infected people as of 25th August 2020. This outbreak of coronavirus is increasing worldwide, and this situation not only prepares mankind for fighting today's challenge but is also preparing for such type of future outbreaks. This paper highlights the symptoms, preventive measures and future challenges of COVID-19 based on the data referred from the World Health Organization (WHO).