In the current century, communication around the world has developed quickly because of telecommunications and air travel. Although it is easier to spread diseases, I believe that the advantages outnumber the disadvantages because people are easily connected can connect easily with each other. The main disadvantage of the rapid development of communication around the world because of air travel and telecommunications is that diseases can spread easily. That is to say that nowadays, it is much easier to travel abroad, and that is why a lot of people travel to foreign countries, but, if they have diseases, they can be quickly transmitted. For example, Covid-19 started in Wuhan, China, and just one week later, it had spread globally due to air travel. However, I believe that the advantages outweigh the disadvantages because many people are vaccinated, and the spread of diseases can be stop stopped. The main advantage of the fast development of communication in th...