First of all, keep your house clean, wash your hands and avoid public places if possible. Second, eat healthy food and work out regularly. Personally, I take vitamins and supplements on a daily basis. Besides, make sure you buy licensed medicine and vitamins. I usually buy all the meds from Canadian Pharmacy, so recommend.
I guess you should take some really good vitamins and supplements which will work good and help you stay healthy. I would like to recommend that you have a look at some helpful meds on Canadian Pharmacy, for example. I am sure that you will find it interesting and find some great stuff for you there, check it out