Final answer:
Babies receive a shot of vitamin K in their leg after birth to prevent vitamin K deficiency bleeding.
Step-by-step explanation:
Babies do receive a shot of vitamin K in their leg after birth. This is because newborn babies have low levels of vitamin K, which is necessary for blood clotting. The shot helps to prevent a rare but serious condition called vitamin K deficiency bleeding (VKDB). VKDB can cause excessive bleeding, which can be life-threatening.