Calcium's location in the periodic table of the elements. Photo Credit: Todd Helmenstine. Potassium is the 20 th element on the periodic table. It is located in period 4 and group 2.alcium's location in the periodic table of the elements. Photo Credit: Todd Helmenstine. Potassium is the 20 th element on the periodic table. It is located in period 4 and group 2.
The contagious period is the amount of time during which a sick child can give the disease to others. For major illnesses (such as hepatitis), a child will need to stay at home or in the hospital until all chance of spread has passed. For minor illnesses (like the common cold) the guidelines are less strict.
When the virus breaks out of those dead cells and starts infecting tons of other cells throughout your body, your immune system recognizes that something is wrong and begins its counterattack. All of this can take days to happen. With the flu in particular, the time between exposure and the onset of symptoms is usually between one and four days. So, when are you most contagious? Most experts agree that adults with a cold or the flu start being contagious about a day before they start experiencing symptoms. For the flu, the contagious period then lasts five to seven days into the illness.