When 20 Squadron deployed to Chaing Mei, as was the local custom, "Entertainment Establishments" were set up in the vicinity. On return to Tengah it was alleged that over 100% of cases of the personnel who had deployed to support the squadron had contracted "Tropical Diseases", meaning that some had been there long enough to be cured of the first dose before suffering a second.
As Tengah Type will recall, on arrival in FEAF, all ranks had to view the film which told you how to avoid getting a dose of clap. This came too late for a chum of mine who was part of a crew ferrying an Andover out from the UK to form 52 Squadron at Seletar, which had staged through Thailand. Having visited one of the "entertainment establishments " referred to, he duly arrived in Singapore with a dose. Wisely he didn't report sick, as the then station commander was very hard on officers thus afflicted, but went to the well known Indian "clap doctor" somewhere down Jalan Kayu, who would treat you for a fee, but with no questions asked.