About 54 percent of Americans are sensitive to at least one allergen, according to the National Institutes of Health, and allergy rates are two to five times higher than in 1980. Chicago-based Hyatt Hotels Corp. announced this week the launch of allergy friendly rooms, the first major chain to offer hypoallergenic rooms across its brands relying on Pure Solutions, a privately held New York-based company that claims it can remove 98 percent of bacteria and viruses from hotel rooms. Hyatt said that between 3 and 5 percent of rooms at Hyatt Resort, Park Hyatt, Grand Hyatt, Hyatt Regency, Hyatt and Andaz properties across the U.S., Canada and the Caribbean will have hypoallergenic rooms available for a total of 2,000 rooms at 125 properties.