Smoking combined with radon is an especially serious health risk.

Children have smaller airways than adults, which makes asthma especially serious for them.

Spread through the air, rubella is especially serious for pregnant women.

This time I tried to make them especially serious.

Health officials say the problem is especially serious in the New York region.

Attacks on Duvalier from within the military were treated as especially serious.

That possibility is especially serious in the relatively built up areas of the Delta.

The fact that we suspect the Indian government of having a part in all this is an especially serious matter.

Children may be more sensitive to the side effects of this drug, especially serious liver problems.

If a situation is especially serious, she will point out the matter for immediate action.