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.
Adolescents and adults have accounted for more than half of reported cases of whooping cough in recent years. Adults and adolescents with pertussis (and those partially protected by the pertussis vaccine) can become infected but often have milder whooping cough symptoms. In some cases, they may have no symptoms at all.