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What would a public health worker most likely encourage a community to do

Explain the purpose and function of the icd-10-pcs coding system, include reasons for the transition from icd-9 vol. 3.

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).