1.   The amount of diarrhoea in acute cholera infection is also very variable.

2.   HEALTH officers on Sunday boarded flights arriving from Thailand to examine returning Hong Kong travellers for possible cholera infection.

3.   HONG Kong will immediately begin inspecting cockles from Thailand to curb a recent spate of cholera infections.

4.   The finding is important because it shows how the cycle of cholera infection is sustained and even amplified by poor sanitation.