This poison must enter the bloodstream for it to work.

We planned to enter the bloodstream and let the current carry us where it would.

It enters the bloodstream and is transported all over the body.

The infection is difficult to treat after it enters the bloodstream.

It entered her bloodstream when she was a girl, she said.

Some dental work can cause bacteria in the mouth to enter the bloodstream.

The virus can spread when infected blood enters the bloodstream of another person.

If it were to enter your bloodstream through the open scratches, the situation could even become fatal.

Could toxins, too, be quickly entering the bloodstream from the colon?

There's also a small chance that the infection may enter the bloodstream and spread to other organs.