HI, My son (18) had a terrible case of mono in October - a lot like your son, but without strep. My son had a dangerously enlarged spleen (close to rupture) and a very sore throat (bleeding, even) and cold, plus the exhaustion. After 10 days of terrible symptoms, his coach told us about Reliv nutritional products. We put our son on them on a Monday, and on Wednesday he actually went back to school for the whole day. He was exhausted when he came home, of course, but we only expected him to go for an hour. Two days later, he went to the doctor, and his spleen was completely normal and he was cleared for all activities and sports. I spoke with several other moms whose kids had similar results. I can't save enough about these products - it is all science, research-based, patented, and available through educated distrubutors, many of whom are women and moms. You can go to the website or contact me for info - ###-###-#### or ____@____.com - it's best if you work with a distributor but the company can refer you to someone if you don't want to use me. The company has been written up in Forbes, Fortune, Success from Home and Business Week. Highly reputable. There is a children's product, but your kids, especially the older one, might be ready for the adult products, depending on his stage of development. We can discuss this. The nutrition is liquid based, so it is rapidly and completely absorbed (unlike vitamin pills) and a mix of high protein, vitamins and minerals (and this is key...) IN THE RIGHT RATIOS. My son completely recovered in record time, and went back to running, often 8 to 11 miles a day. My husband (almost 60) is now running 25 miles a week instead of 12, and I recovered from bronchitis in 3 days instead of 3 weeks. None of us has been sick since. Our stories are not unique. Reliv will connect you with lots of people with similar results, and there are conference calls you can listen in on for more stories. Reliv gives your kids the nutrition they aren't getting from processed and vitamin-depleted foods - even if we eat "right" our foods don't have the value they used to have because we grow them too fast and harvest them too early. For the cost of a daily latte, you can give your son his life back! Mono can take many months to fully resolve, but it doesn't have to be this way. I'd be happy to give you more information, and then you can decide. No pressure, just info and options. GOod luck!