While chasing another student on the trail, a boy fell and cut himself on the jagged rock. the cut is deep and bleeding won't stop. what are the first steps to take?

What link in the chain of transmission is described in the paragraph? sarah has been eating and sleeping poorly. she was just diagnosed with pneumonia. tests showed the illness was caused by streptococcus pneumoniae. in the chain of transmission, sarah is the (blank) , and streptococcus pneumonia is the (blank).