new blood

Idioms  

1. Additional, fresh individuals regarded as an invigorating force, as in an organization. For example, The board could really use some new blood next year. This metaphoric expression, first recorded in 1853, alludes to a blood transfusion and employs new in the sense of “fresh.”

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Example Sentences

The formation of new blood vessels can take weeks, and short bursts of oxygen are not enough to support lasting repair.

From Science Daily

This protein helps tumors thrive by encouraging the formation of new blood vessels, preventing cancer cells from dying, and weakening immune cells that would otherwise help eliminate the cancer.

From Science Daily

But if there is to be new blood then who is in line?

From BBC

Metformin also influences major cellular pathways such as AMPK, mTOR, and PI3K/AKT, which help regulate cell growth, cell death, and the formation of new blood vessels.

From Science Daily

Bring on the new blood in the semifinals when Miami takes on Ole Miss in the Fiesta Bowl on Jan. 8 and Indiana faces Oregon in the Peach Bowl on Jan. 9.

From Los Angeles Times