Once the virus was introduced to Warlock's unique physiology, it mutated and became even more contagious.

If there is a conflict, a surge in violence, it becomes contagious in the region.

Now, though, the terror had become contagious, clutching at them all, and their behavior was unpredictable.

The switchover from fear to adventurousness had been as abrupt as it was now becoming contagious.

Instead, it has a gratingly loud laugh track, which shows no signs of becoming contagious.

The commitment to defense has become contagious.

"I think the things that I do on the court become contagious," said Jackson, who averages nine assists a game.

Fischer laughed, and Sarah could see that his high spirits were becoming contagious.

Your system has not been able to build up proper immunities to us, and we're becoming contagious.

Indeed, Cone's pitching is indicative of how success has suddenly become contagious.