I don't have much to offer except maybe he needs to have some help boosting his immunity. Try to get some Sambucol or elderberry. It is an anti-viral used around the world to fight influenza and other viruses. I get it at the local CVS pharmacy. I am not suer what you have in the Philippines but this is used around the world. I use it everyday and so do my children. If you order it online, you can get a children's version of the liquid but that doesn't really matter; they can take the regular one in a smaller dose. There is also a pill that melts on the tongue. Also, I would give him vitamin c and vitamin d3. These things all help the immunity work better. My rule of thumb for my own children...if they are eating okay, drinking plenty of fluids, playing, and just generally seem okay, I don't worry too much. When they have a fever I try to make them comfortable. And I feel like every time I go to the doctor, my kids pick up some virus so I try to keep them home as long as possible. Good luck. I know this is such a worry but you can handle it!