1 a. viruses<span>, bacteria, </span>fungi<span>, </span>protozoa<span>, and worms. 1 c. </span><span>This would indicate that the hosts had some kind of immunity to the pathogen, it's not harmful, the pathogen is weak, or the pathogen does not attack the host 3 a. </span><span>Infectious diseases are spread through coughing, sneezing, physical contact, exchange of body fluids, contaminated water or food, or through zoonosis. I hope this helps you!!</span>