Lagniapposis is caused by a microparasite, Boudreauxia thibodauxi, and is transmitted directly by coughing and sneezing. It is highly transmissible and very virulent. Infected hosts become immune after a week if they do not die. Use the equation for directly transmitted microparasites to discuss the following.

A. Lagniapposis’ current critical threshold density

B. Under what circumstances would you expect lagniapposis to evolve to become less virulent?

C. What is the rationale for vaccination and quarantine?