The bacterium Bordetella pertussis is the primary whooping cough cause. There are no other causes, and the infection follows no distinct seasonal pattern. People may become infected with the bacteria by breathing in tiny droplets released into the air by an infected person's cough or sneeze.
There are approximately 1,892.7 milliliters in 1 half-gallon of volume. That works out to 3,785.4 milliliters per gallon, 1.892 liters per half-gallon and 3.785 liters per gallon.
Other measurements also relate to quarts. A quart consists of 2 pints, and each pint is 2 cups, or 16 ounces. Quarts are also smaller parts of a whole. One gallon equals 4 quarts, and half a gallon is 2 quarts. Since each quart is 32 fluid ounces, a gallon is the same as 128 fluid ounces. When converting to the metric system, a quart is just slightly smaller than a liter.