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.
Some strains of these viruses are contagious up to a few days before to about 5 days after symptoms start. The incubation period is about 4 to 6 days. Adults can get this virus also, but most either have immunity from childhood or simply don't develop the illness.