Hantavirus is a virus that is found in the urine, saliva, or droppings of infected deer mice and some other wild rodents (cotton rats, rice rats in the southeastern Unites States and the white-footed mouse and the red-backed vole).It causes a rare but serious lung disease called Hantavirus pulmonary syndrome (HPS).antavirus is a virus that is found in the urine, saliva, or droppings of infected deer mice and some other wild rodents (cotton rats, rice rats in the southeastern Unites States and the white-footed mouse and the red-backed vole).
The average gross profit for convenience stores in 2009 was about $477,894. About 20 percent of convenience stores do not sell motor fuel that provides a gross profit margin of only about 6.4 percent.
Low Margin Retailers. Gross margins at retail are measured by the total percentage of profit generated by each item sold. For example, a 2007 Forbes magazine study noted that warehouse chain Costco generated margins of about 12.2 percent in the third quarter of 2006.That's considered a thin margin but Costco charges annual membership fees to customers so that it can keep its prices and margins low.ass merchants such as Wal-Mart also generate low margins but make up for it through sales volume. The Forbes magazine study noted that Wal-Mart posted a gross margin of 23.7 percent in the third quarter of 2006, which at the time was its highest margin in four years.