Our expert says:
You can take vit C 1000 mg per day ( but not if you are on the contraceptive pill - may influence the efficacy) or immunoboosters to help you build your immunity ( something like Viral choice C). On an airplane where air is recycled, it is difficult not to get in some germs, but you could wear a surgical mask ( if you are really serious about it !) or take some saline nose spray with you to rinse your nose with during the flight. Wash your hands often, don't rub your eyes or nose or touch your face with your hands if you can help it.
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