Patch combats traveller's trots

Scientists in America say they've developed a needle-free
vaccine for traveller's diarrhoea, having tested the skin
patch on 170 volunteers visiting Mexico and Guatemala.
The patch, which protects against enterotoxigenic E coli,
is described by the people who conducted the test as
" one of the most exciting new developments in travel
medicine ". The vaccine is currently undergoing final
clinical trials, so don't hold your breath.....or your trousers.