The most casual contact was usually sufficient to cause infection.

He also said "that hair could end up on someone's clothing by casual contact or from being airborne."

Experts say it is not transmitted through casual social contact.

There was nothing on her that she couldn't have picked up by casual contact.

As near as I could learn, such families have only the most casual contact.

Hepatitis C is not spread by food or casual contact.

The disease does not pass by casual contact such as through the air or in handshakes.

However, casual contact does not seem to be involved.

You refer to biting as a form of casual contact.

At best, I found casual contacts difficult because of my own background.