Doctors have warned people who are seriously overweight or who have such conditions as high blood pressure, sickle - cell anemia, or heart or lung disease to have a careful medical evaluation before deciding on a trip above the clouds.
अकसर नौजवान इस सलाह को नज़रअंदाज़ करते हैं, इसलिए उन्हें ही सबसे ज़्यादा तकलीफ भुगतनी पड़ती है ।