Pleural effusion. A pleural effusion is excess fluid that accumulates in the pleural cavity, the fluid-filled space that surrounds the lungs. This excess can impair breathing by limiting the expansion of the lungs.
There are 1.5 ounces in a shot. There are 64 ounces in a half gallon. So there are 42.6666667 shots in a half gallon or about 42 1/2 shots in a half gallon. You can find this out by going to Google and typing: shots in half gallon or the long way by typing: ounces in shot and ounces in half gallon
Though Britain could use the equivalent to the USCS jigger (1.56126 fluid ounces, Imperial), I understand they use the metric amount. Notes: 1.5 fl oz (USCS) = 44.3603 ml, so a metric shot is 13% larger than a US shot. There are other size shots. A smaller metric shot is a half shot, 25 ml.