It wouldn't hurt :)
"Plus I travel overseas and could be more at risk.."
[Right now] in the Europe, Russia, Near East (Turkey) & the UK the most recent 'reported' cases making the news are bird to bird transmissions of Avian 'Bird' flu (H5N1).
However there could conceivably be a mutation from the current bird to bird, bird to human transmission, to the deadly human to human transmission. If the mutated form of Avian flu does take place, picture the following scenario;
There's this schlub who visits London, departing from JFK. While in London the schlub gets stuck in an elevator with a lady coughing her head off. In a couple of days the poor schlub begins sniffling & coughing a bit.
By the 3rd day the now Bird flu infected schlub begins to really feel run down, plan lousy, thus decides to return to NY, so he changes his ticket at Heathrow, hops on a fully loaded Virgin Airways flight, coughing & sneezing, all the way across the Atlantic.
Once back at JFK the sickly schlub grabs a cab and coughs his way back to Midtown, with the cabie asking "Are you alright man? You might want to see your doctor."
Regrettably the schlub is not the only one who needs to see a doctor.
(Within 48 hours of contracting (H5N1) Avian 'Bird' flu, current available medicine must be taken to counter the effects.)
Bird Flu Special Report - www.techcentralstation.com
Bird flu – answers to some frequently asked questions - Radio Nederland Wereldomroep