The author of the text is reflecting on how a virus can spread quickly around the world, using the concept of "Six Degrees of Separation" as an analogy. According to this theory, anyone in the world is connected to another person through no more than six intermediate acquaintances. The author explains that this idea was first proposed by Stanley Milgram in 1967 and has since been popularized by various media, including a film starring Will Smith. To test this concept, the author created an app called Pathica, which allows users to find connections between individuals through their social networks. The app uses a graph database, Neo4j, to efficiently analyze large amounts of data and provide results in just 0.03 seconds, much faster than traditional relational databases. The author is excited about the potential applications of this technology and plans to write more articles on its development and challenges.