The hybrid strain proved less lethal and was transmitted only once after long contact.

A relationship on the wane with Ulrich could prove lethal.

But now you'd introduce exotic new factors that just happen to feel good in the short term, even though they may prove ultimately lethal.

A breakdown in frozen conditions can prove lethal for those unprepared.

They want good light, but dry out quickly and a few dead wilts can prove lethal.

As I understand it, alcohol addiction is more likely to prove lethal than most of the illegal alternatives.

They would certainly try to cope, and even failure on their part might prove lethal.

The colder temperatures which occur in the winter can also prove lethal.

But that kind of testimony has proved lethal to our case in the past.

It can also prove lethal to nearby life forms.