The definition of a landslide is a situation when dirt, rock or other pieces of earth begin to slide down a mountain or slope, or when someone wins a contest by a big majority. 1  An example of a landslide is when heavy rains cause dirt and earth to fall rapidly down a cliff, sometimes even carrying buildings down with them. An example of a landslide is when a candidate wins by 100 to 1.
Although the typical incubation period for influenza is about one to four days, some adults can be contagious from about one day before onset of symptoms for up to two weeks. Other people who develop complications, such as pneumonia, may extend the contagious period for a week or two.
Children may pass the virus for longer than 7 days. Symptoms start 1 to 4 days after the virus enters the body. Information about how long a person is contagious is available at How Flu Spreads.easonal influenza, commonly called âthe flu,â is caused by influenza viruses, which infect the respiratory tract (i.e., the nose, throat, lungs). Unlike many other viral respiratory infections, such as the common cold, the flu can cause severe illness and life-threatening complications in many people.