Answer: Pertussis
Explanation:
Pertussis, also known as whooping cough, is a contagious disease that is caused by a type of bacteria called Bordetella pertussis. This cough is usually very dangerous for children, where apart from coughing, runny nose, sneezing, and nasal congestion also manifest. Pertussis can be prevented through the pertussis vaccine.
Answer: ?
Explanation: No information given
that secrete their products, hormones, directly into the blood rather than through a duct.
This is not really a question.