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.[10][1] 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 disease is transferred from person to person by bacteria-contaminated droplets formed during a coughing spell; however, the disease may be prevented by vaccinations. Symptoms of whooping cough vary. Early in the infection, the symptoms resemble those of a cold; mild fever, nasal congestion, sneezing, nasal discharge, and a dry cough. However, in contrast to a cold, the symptoms persist and worsen over about one to two weeks.