Enter the size of the slab you want to build in square feet. The calculator will indicate the number of 60 lb bags you will need to build a 4 inch or 6 inch slab. (all yields are approximate and do not allow for uneven substrate, waste, etc.)
Pertussis (also known as whooping cough or 100-day cough) is a highly contagious bacterial disease. Initially, symptoms are usually similar to those of the common cold with a runny nose, fever, and mild cough. This is then followed by weeks of severe coughing fits.
The symptoms of the catarrhal stage are mild and may go unnoticed. The paroxysmal stage of Pertussis is characterized by episodes of coughing with a distinctive whooping sound when breathing in (inspiration). This characteristic cough gives the disease its common name, Whooping Cough.