Hello, my friend is diagnosed with dengue. He found out just yesterday. But because he is staying far from home, he is willing to come home which will take him 5 hours of train travel, 2 hour stay at airport and 2 hour air travel means total 9 restless hours, that too alone. Is it safe for him to travel in this situation and what are be the precautions he can take while travelling to prevent his situation from getting any worse?