1.   Beware of some proprietary brands - most are for preventative use and will have little effect against serious outbreaks of parasites.

2.   It was obviously a very serious outbreak last year, what are the chances of it happening again?

3.   And last year, it came close to a serious outbreak in India.

4.   And there have been serious outbreaks of political violence in the capital and the countryside.

5.   Before the advent of penicillin a half-century ago, serious staph outbreaks sometimes forced the closure of entire hospital wings.

6.   But New Jersey officials say there have been no serious outbreaks of disease in the prisons since April, when the state began charging the fees.

7.   Hopes are still high in Skopje that a serious outbreak of ethnic violence can be avoided.

8.   It was the first serious outbreak of street trouble in Northern Ireland since the Irish Republican Army cease-fire was declared two weeks ago.

9.   Japanese researchers have found a type of flu virus in Indian parakeets which could cause a serious outbreak in humans if it mutated.

10.   Listeria had not been a problem in recent years, but led to one serious outbreak and eight recalls of cold cuts and hot dogs from December to February.