Causes. Pertussis, a respiratory illness commonly known as whooping cough, is a very contagious disease caused by a type of bacteria called Bordetella pertussis.hile pertussis vaccines are the most effective tool we have to prevent this disease, no vaccine is 100% effective. If pertussis is circulating in the community, there is a chance that a fully vaccinated person, of any age, can catch this very contagious disease.
1 Do-it-yourself pool cleaning runs $20-$100 per month for chemicals during the summer after initial purchase of pool tools including a vacuum head and hose from $50, and a maintenance kit with a wall brush, leaf skimmer, test kits and telescopic pole for around $60. Regular filter cleaning costs around $60-$65. 2  Power vacuuming is intense cleaning for a neglected pool and runs $55-$124 per hour. 3  Pools that are properly covered during the winter will require an opening service that prepares the pool for summer use.
In-ground pools vary in cost, depending on their size, lining and extra amenities. Vinyl-lined pools are least expensive ($7,000 - $16,000), fiberglass pools cost $15,000 - $25,000 and concrete or gunite can run you anywhere between $17,000 and $45,000.Chemical costs average $95 a month, and as the average American keeps the pool open seven months of the year, annual chemical costs can exceed $660.he cost of an above ground pool will vary based on size and shape. Larger, as well as oval-shaped pools will be most expensive. Filling this type of pool uses only 18,015 gallons of water, on average, and chemicals average $80 a month.