ds didn't have a booster. it is supposed to last for longer than a year though so you get cumulative protection from getting the flu shot every year (or so we were told - maybe this will also turn out not to be true? )
PrettyCandles, DS1(12) had a flu jab on Saturday for the very first time. He is also asthmatic, but we did not know (and were never told) that he was eligible to have it before. The nurse said as it was his first time, he could only have half dose and we need to go back in a months time for the rest.