Americans are eating more whole fruits, nuts and seeds, and drink fewer sugary drinks, than they were in 1999.
But the gap between the diets of rich and poor seems to be widening. Low-income urban areas that are at least a mile from the nearest supermarket, and rural areas that are at least ten miles from any grocery store, are considered “food deserts”. In 2009 4.1% of America’s population lived in such deserts.
If fresh food becomes more available, though, it will not necessarily get eaten.
A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.
There are millions types of viruses, ~ 5,000 virus species have been described in detail. Viruses are found in almost every ecosystem and are the most abundant type of biological entity. The origins of viruses in the evolutionary history of life are unclear.
While not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles, virions, which consist of the genetic material made from either DNA or RNA, a protein coat, and in some cases an outer coat of lipids. Virion is about one one-hundredth the size of a bacterium.