Research has shown that saunas boost your immune system. The extreme heat that saunas generate makes your body produce white blood cells more rapidly. Since white blood cells help fight against both infectious diseases and viruses, it helps your overall body with staying healthy. Infrared sauna equipment can also help with colds and allergies as the steam fights against congestion. This steam vapor clears up unwanted congestion and makes the experience of being sick much easier to cope with. You can also add eucalyptus oil to disinfect the sauna and make the experience much better.