Chances of performing successful first aid increase if more then one person is involved

Comprehensive information on medications can be found at

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).

Which of these technological advances has improved flu vaccines? a. ct scans b. cell-based culturing c. egg production d. glucose monitors