BBC News Online examines the case and its implications for other parents.

What were these cases about?

These cases came to the courts because two sets of parents couldn't agree on whether or not their children should be vaccinated against MMR using the controversial three-in-one vaccine.

In both cases, the women were opposed to their children having the jab. However, the men disagreed and wanted their children vaccinated against mumps, measles and rubella.

The men believed their children were being put at risk by not having the jab and wanted the courts to intervene.

Why are the women against the three-in-one jab?

No one involved in this case can be identified for legal reasons. However, it is understood that both of the women believe the three-in-one vaccine is unsafe.

One of the women, who is understood to be a midwife working in the South of England, is opposed to her child having any vaccinations.

Are their fears justified?

Doctors and officials in the Department of Health would say that the mother's fears are not justified.

They insist that the three-in-one vaccine is safe.

However, a number of studies have linked the three-in-one jab to autism and bowel disease - although others have failed to detect it.

The vast majority of doctors and scientists have dismissed doubts about the safety of MMR.

But the claims have led many parents to think twice before having their children vaccinated using the three-in-one jab.

What did the court decide?

The High Court ruled in favour of the fathers and against the mothers. Mr Justice Sumner said vaccination is in the best interests of the children. He said the benefits outweighed any risks.

That ruling means the children must now be vaccinated against MMR, although it remains unclear how this will be enforced.

What does the ruling mean for other parents?

This ruling could have major implications for parents across the country, especially those who are in similar situations to those involved in today's case.

In theory, it means parents who are divided over whether or not their children should be vaccinated against MMR using the three-in-one vaccine can now ask the courts to order the children to be vaccinated.

How are people reacting to this case?

Campaigners who are opposed to the three-in-one vaccine expressed their concern within minutes of the verdict being made public.

Jackie Fletcher of JABS said no parent should be forced into having their children vaccinated against their wishes.