Why do I always get sick on holiday?

Yet, our immune systems are no match for places like airports, where a planet’s worth of different viruses linger. All the while you’re spending an abundance of time with others carrying around sicknesses, normally in close proximity. A good example of that is an airplane cabin. Even though the air conditioning system prevents most germs from being circulated through the cabin, sitting within a two-seat area of a sick passenger puts you at a greater risk of catching a bug.Cabins, though, are hardly the only danger zone you’ll find yourself in at an airport. Any largely crowded area is susceptible to spreading viruses with ease, with a growing risk the longer you’re in contact with others. So places like security lines, flight gates, or during boarding procedures can present transmission opportunities.