The chain of infection begins when a biological agent thrives within a a. portal of entry. b. portal of exit. c. reservoir. d. susceptible host

Occurs when the immune system attacks the body. lupus cancer sickle cell disease huntingtons disease

Why is sustainable agriculture so important?

At school, there have been a lot of rumors going around about how certain sexually transmitted diseases are spread. which skill would be most valuable to you take the necessary steps to learn what you need to know to protect yourself? a. self-direction b. critical thinking c. problem solving d. effective communication       select the best answer from the choices provided.