“The world has changed, and human-migration is
easier than ever. For example, Chinese Lunar Year
or “Chunyun” is the world’s largest annual migration
event involving 2.99 billion trips (2020 estimate).
Of those, 2.43 billion trips are made by automobile,
440 million by rail, 79 million by air and 45 million
(Source: BIOHACKER’S FLU GUIDE)