What prevents bullets from stricking a soilder's chest when he is on the chest board?

When a soldier is on a chest board, they often wear body armor designed to absorb and deflect bullets, significantly reducing the risk of injury to the chest area. Additionally, tactical positioning and movement can help minimize exposure to enemy fire. The use of cover and concealment in combat situations also plays a crucial role in protecting soldiers from direct hits. Overall, a combination of protective gear and strategic tactics helps safeguard against bullets.