Measuring how long drugs remain in your system is based on the drug's half-life, or the amount of time it takes a drug to leave your body. The half-life is best described as the amount of time it takes the liver and kidneys to filter and break down the drug within your bloodstream.
A person is not usually contagious during the norovirus incubation period. People infected with norovirus are usually contagious from the moment they begin feeling ill to at least 3 days after recovery. Some people may be contagious for as long as 2 weeks after recovery.fter approximately 1 to 2 days, norovirus symptoms can appear. This period between the norovirus transmission and the start of norovirus symptoms is known as the norovirus incubation period..
Incubation period. For an airway infection it takes around 2 to 14 days for the symptoms to appear after exposure to the virus. This is called the incubation period. For intestinal infections the incubation period is 3 to10 days.denoviruses are a family of viruses. These may cause infections in humans as well as animals. The most common infections caused by adenoviruses are respiratory tract infections. Adenovirus often infects the airways and the intestinal tract.