SIR/SEIR disease modeling, R0 calculation, herd immunity thresholds, and outbreak economic impact for livestock, poultry, and aquaculture populations. Translate epidemiology into vaccine program decisions.
Calculate R₀ — the average number of secondary infections from one infected animal in a fully susceptible population. R₀ determines epidemic potential and drives herd immunity threshold calculations.
Calculate the minimum vaccination coverage required to prevent epidemic spread. The herd immunity threshold (HIT) is the cornerstone of any population-level vaccine program design.
Project the number of exposed, infected, and recovered animals over time using the SEIR (Susceptible-Exposed-Infected-Recovered) compartmental model. Critical for outbreak planning and vaccine timing decisions.
Calculate the critical window between disease introduction and detectable outbreak. Early detection is the single biggest driver of outbreak cost — quantify the economic value of surveillance programs.
VS5 provides veterinary epidemiology calculators that translate disease science into vaccine program decisions. Models include R₀ calculation, herd immunity thresholds, SEIR outbreak projection, and full outbreak economic impact — the quantitative backbone of any population-level vaccination strategy.
For livestock vaccines: VS1 Livestock → · For poultry vaccines: VS2 Poultry → · For biosecurity: VS6 Biosecurity →
Research sources: Anderson & May (1991) Infectious Diseases of Animals; Keeling & Rohani (2008) Modeling Infectious Diseases; USDA-APHIS FAD Prep; OIE/WOAH disease standards. VacStak — vacstak.com · Patent Pending · US App 63/970,943.