what did you notice about your heart rates?do you think it is necessary to learn how to estimates these type of heart rate? why?replyy ppllsss​

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).