Final answer:
The COVID-19 pandemic rapidly spread around the world through airborne transmission and human contact. The global nature of our lives, including international travel and urban settings, facilitated the spread. Public health measures like quarantine and hygiene practices are crucial in controlling the spread of contagious diseases.
Step-by-step explanation:
The COVID-19 virus spreads through airborne transmission when someone inhales droplets expelled by an infected person coughing, sneezing, or exhaling. The disease started spreading in late 2019 in Wuhan, China, and quickly spread to other countries through international travel. The virus has now spread to almost every country in the world, facilitated by global air travel.
The concentration of large numbers of people in urban settings also contributed to the spread of the virus through touch. Infected individuals can spread the virus by touching non-infected persons or objects, which are then touched by non-infected persons.
The COVID-19 pandemic demonstrates the rapid spread of contagious diseases in today's globalized world, highlighting the importance of public health measures, such as quarantine and hygiene practices, in controlling the spread.