There are many things that can weaken consumers’ immune systems, including the common cold, sleep deprivation and even flying in an airplane, where disease-causing bacteria can survive for up to a week inside warm plane cabins, wreaking havoc on the immune system, according to a 2014 study from Auburn University, Auburn, Ala.
Dry air on a plane can cause dehydration so staying properly hydrated with water and boosting the immune system 2-3 days ahead of flying may help prevent this occurrence. Extra vitamin C and B-complex vitamins as well as consuming all-natural fruits and beverages containing antioxidant-rich blueberries, oranges, cherries and elderberries also may boost the immune system, experts note.