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.
U.S. gallons are different from imperial gallons. 1 Imperial gallon is equal to 4.54609188 litres and 1 US gallon is equal to 3.78541178 litres. Liters on the other hand are t â¦ he same everywhere. One liter equals 0.26 U.S. gallon or 0.219 Imperial gallon.