But there is more to a cell wall than just peptidoglycan. In nature, there are two major types of cell walls, Gram-positive and Gram-negative, each with very different structures. The term 'Gram' refers to the Gram-staining technique that differentiates bacteria with the two different cell walls.
Although infections from other viruses may have similar symptoms, those due to the influenza virus tend to be worse. Symptoms can begin about 1 to 4 days, or an average of 2 days, after a person is first exposed to the influenza virus.Fever and other symptoms can usually last up to 7 to 10 days, but the cough and weakness may last 1 to 2 weeks longer.If you get sick with influenza, home treatment can help ease symptoms.lthough infections from other viruses may have similar symptoms, those due to the influenza virus tend to be worse. Symptoms can begin about 1 to 4 days, or an average of 2 days, after a person is first exposed to the influenza virus.
Flu (influenza). Flu is usually infectious a day before symptoms start and remains infectious for about five to six days. Children and people with lowered immune systems may be infectious for a few days longer.n adults and older children, cold symptoms usually last about a week, although a cough may last up to three weeks. Colds tend to last longer in children up to the age of five, typically around 10-14 days. Flu is usually infectious a day before symptoms start and remains infectious for about five to six days.