Viruses are the smallest microbes; only bacteria, protozoa and fungi are larger in size. Some of the harmful viruses are the Swine influenza (flu) virus, the SARS flu (Severe Acute Respiratory Syndrome) virus, Asian Flu and Hong Kong Flu viruses.
Air Oasis G3 Air-Purifiers (Patent Pending) Whereas HEPA filters can only remove small particulates, and carbon filters can only remove chemicals, VOC and odors, Air Oasis G3 UV technology is highly tested and proven to remove most viruses, bacteria, MRSA (Methicillin-resistant staphylococcus aureus), mold spores, VOCs, chemicals, gases, odors, pet dander, pollen and particles of 0.001 micron size. There are many models of Air Oasis, but the Air Oasis G3 Portable is specially designed for small rooms such a nursery/bedroom/study.
Airfree Air Sterilizesr Airfree P1000, Platinum P2000 and Onix 3000 heat sterilizers are claimed to be the safest and most tested air purifiers. They work only on heat. Inside their patented ceramic core, 99.99% of microorganisms (molds, yeasts, bacteria and viruses) are destroyed at around 400F without increasing the room temperature noticeably. This technology provides silent, effective operation, is maintenance-free, and energy efficient (uses below 52 watts); available in three models./p>