
Notation  Explanation 

 Total number of hosts in the network 
 Number of susceptible hosts at time 
 Number of exposed hosts at time 
 Number of infectious hosts at time 
 Number of delayed hosts at time 
 Number of quarantined hosts at time 
 Number of vaccinated hosts at time 
 Infection rate 
 The rate at which exposed hosts become infectious 
 Removal rate of infectious hosts 
 The rate at which vaccinated hosts become susceptible 
 The rate at which exposed hosts are vaccinated or treated 
 Removal rate of quarantined hosts 
 Quarantine rate of infectious, exposed, and susceptible hosts 
 Time delay of detecting and removing worms 
