1. Patients with cardiovascular and cerebrovascular diseases such as heart disease and severe hypertension: Because they are prone to lack of oxygen on the plane, their condition will be aggravated;
2. Babies who can't swallow saliva can't adapt to high altitude and low oxygen environment. It is best to fly when you are born 14 days or more and you are in good health; 3. Patients with respiratory diseases will expand lung gas and aggravate the condition; Severe anemia leads to aggravation of hypoxia; ? 4, patients with otolaryngology diseases, or take a plane again, after all, when the plane takes off and lands, the ears are the most uncomfortable, and the seven holes are connected, think for yourself; 5. Do people with infectious diseases go up to harm others? The plane is closed, please put your feet down, don't get on the plane, it will infect others; 6, patients with severe stomach problems, in fact, not just airplanes, you may feel uncomfortable by taking the bus, taking the high-speed rail, without bumps, will not cause discomfort and bleeding;
7, pregnant women are in labor, flying can easily lead to premature delivery of the fetus, especially pregnant women after 35 weeks of pregnancy, and it is even more unfavorable to fly. In case of labor on the plane, it would be really bad;
8. Children can't fly alone. If you are not accompanied by family or friends, please contact your local airline to see if you can find an unaccompanied service.
9, the elderly are not suitable for flying, unless the elderly are in good health, it is safer to take the high-speed rail;
Finally, there are people who are afraid of heights. What planes do these people take? You were tricked into getting on the plane blindfolded, right? (Just kidding)