Mathematical Epidemiology | p. 1 |
Introduction and General Framework | |
A Light Introduction to Modelling Recurrent Epidemics | p. 3 |
Introduction | p. 3 |
Plague | p. 4 |
Measles | p. 5 |
The SIR Model | p. 6 |
Solving the Basic SIR Equations | p. 8 |
SIR with Vital Dynamics | p. 11 |
Demographic Stochasticity | p. 13 |
Seasonal Forcing | p. 13 |
Slow Changes in Susceptible Recruitment | p. 14 |
Not the Whole Story | p. 15 |
Take Home Message | p. 16 |
References | p. 16 |
Compartmental Models in Epidemiology | p. 19 |
Introduction | p. 19 |
Simple Epidemic Models | p. 22 |
The Kermack-McKendrick Model | p. 24 |
Kermack-McKendrick Models with General Contact Rates | p. 32 |
Exposed Periods | p. 36 |
Treatment Models | p. 38 |
An Epidemic Management (Quarantine-Isolation) Model | p. 40 |
Stochastic Models for Disease Outbreaks | p. 45 |
Models with Demographic Effects | p. 45 |
The SIR Model | p. 45 |
The SIS Model | p. 52 |
Some Applications | p. 55 |
Herd Immunity | p. 55 |
Age at Infection | p. 56 |
The Interepidemic Period | p. 57 |
"Epidemic" Approach to the Endemic Equilibrium | p. 59 |
Disease as Population Control | p. 60 |
Age of Infection Models | p. 66 |
The Basic SI* R Model | p. 66 |
Equilibria | p. 69 |
The Characteristic Equation | p. 70 |
The Endemic Equilibrium | p. 72 |
An SI* S Model | p. 74 |
An Age of Infection Epidemic Model | p. 76 |
References | p. 78 |
An Introduction to Stochastic Epidemic Models | p. 81 |
Introduction | p. 81 |
Review of Deterministic SIS and SIR Epidemic Models | p. 82 |
Formulation of DTMC Epidemic Models | p. 85 |
SIS Epidemic Model | p. 85 |
Numerical Example | p. 90 |
SIR Epidemic Model | p. 90 |
Numerical Example | p. 93 |
Formulation of CTMC Epidemic Models | p. 93 |
SIS Epidemic Model | p. 93 |
Numerical Example | p. 97 |
SIR Epidemic Model | p. 98 |
Formulation of SDE Epidemic Models | p. 100 |
SIS Epidemic Model | p. 100 |
Numerical Example | p. 103 |
SIR Epidemic Model | p. 103 |
Numerical Example | p. 105 |
Properties of Stochastic SIS and SIR Epidemic Models | p. 105 |
Probability of an Outbreak | p. 105 |
Quasistationary Probability Distribution | p. 108 |
Final Size of an Epidemic | p. 112 |
Expected Duration of an Epidemic | p. 115 |
Epidemic Models with Variable Population Size | p. 117 |
Numerical Example | p. 119 |
Other Types of DTMC Epidemic Models | p. 121 |
Chain Binomial Epidemic Models | p. 121 |
Epidemic Branching Processes | p. 124 |
MatLab Programs | p. 125 |
References | p. 128 |
Advanced Modeling and Heterogeneities | |
An Introduction to Networks in Epidemic Modeling | p. 133 |
Introduction | p. 133 |
The Probability of a Disease Outbreak | p. 134 |
Transmissibility | p. 138 |
The Distribution of Disease Outbreak and Epidemic Sizes | p. 140 |
Some Examples of Contact Networks | p. 142 |
Conclusions | p. 145 |
References | p. 145 |
Deterministic Compartmental Models: Extensions of Basic Models | p. 147 |
Introduction | p. 147 |
Vertical Transmission | p. 148 |
Kermack-McKendrick SIR Model | p. 148 |
SEIR Model | p. 150 |
Immigration of Infectives | p. 152 |
General Temporary Immunity | p. 154 |
References | p. 157 |
Further Notes on the Basic Reproduction Number | p. 159 |
Introduction | p. 159 |
Compartmental Disease Transmission Models | p. 160 |
The Basic Reproduction Number | p. 162 |
Examples | p. 163 |
The SEIR Model | p. 163 |
A Variation on the Basic SEIR Model | p. 165 |
A Simple Treatment Model | p. 166 |
A Vaccination Model | p. 168 |
A Vector-Host Model | p. 170 |
A Model with Two Strains | p. 171 |
R[subscript o] and the Local Stability of the Disease-Free Equilibrium | p. 173 |
R[subscript o] and Global Stability of the Disease-Free Equilibrium | p. 175 |
References | p. 177 |
Spatial Structure: Patch Models | p. 179 |
Introduction | p. 179 |
Spatial Heterogeneity | p. 180 |
Geographic Spread | p. 182 |
Effect of Quarantine on Spread of 1918-1919 Influenza in Central Canada | p. 185 |
Tuberculosis in Possums | p. 188 |
Concluding Remarks | p. 188 |
References | p. 189 |
Spatial Structure: Partial Differential Equations Models | p. 191 |
Introduction | p. 191 |
Model Derivation | p. 192 |
Case Study I: Spatial Spread of Rabies in Continental Europe | p. 194 |
Case Study II: Spread Rates of West Nile Virus | p. 199 |
Remarks | p. 202 |
References | p. 202 |
Continuous-Time Age-Structured Models in Population Dynamics and Epidemiology | p. 205 |
Why Age-Structured Models? | p. 205 |
Modeling Populations with Age Structure | p. 206 |
Solutions along Characteristic Lines | p. 208 |
Equilibria and the Characteristic Equation | p. 209 |
Age-Structured Integral Equations Models | p. 211 |
The Renewal Equation | p. 212 |
Age-Structured Epidemic Models | p. 214 |
A Simple Age-Structured AIDS Model | p. 215 |
The Reproduction Number | p. 216 |
Pair-Formation in Age-Structured Epidemic Models | p. 218 |
The Semigroup Method | p. 220 |
Modeling with Discrete Age Groups | p. 222 |
Examples | p. 223 |
References | p. 225 |
Distribution Theory, Stochastic Processes and Infectious Disease Modelling | p. 229 |
Introduction | p. 230 |
A Review of Some Probability Theory and Stochastic Processes | p. 231 |
Non-negative Random Variables and Their Distributions | p. 231 |
Some Important Discrete Random Variables Representing Count Numbers | p. 234 |
Continuous Random Variables Representing Time-to-Event Durations | p. 237 |
Mixture of Distributions | p. 239 |
Stochastic Processes | p. 241 |
Random Graph and Random Graph Process | p. 248 |
Formulating the Infectious Contact Process | p. 249 |
The Expressions for R[subscript 0] and the Distribution of N such that R[subscript 0] = E[N] | p. 251 |
Competing Risks, Independence and Homogeneity in the Transmission of Infectious Diseases | p. 254 |
Some Models Under Stationary Increment Infectious Contact Process {K(x)} | p. 255 |
Classification of some Epidemics Where N Arises from the Mixed Poisson Processes | p. 255 |
Tail Properties for N | p. 258 |
The Invasion and Growth During the Initial Phase of an Outbreak | p. 261 |
Invasion and the Epidemic Threshold | p. 262 |
The Risk of a Large Outbreak and Quantities Associated with a Small Outbreak | p. 263 |
Behaviour of a Large Outbreak in its Initial Phase: The Intrinsic Growth | p. 273 |
Summary for the Initial Phase of an Outbreak | p. 280 |
Beyond the Initial Phase: The Final Size of Large Outbreaks | p. 281 |
Generality of the Mean Final Size | p. 282 |
Some Cautionary Remarks | p. 283 |
When the Infectious Contact Process may not Have Stationary Increment | p. 285 |
The Linear Pure Birth Processes and the Yule Process | p. 286 |
Parallels to the Preferential Attachment Model in Random Graph Theory | p. 288 |
Distributions for N when {K(x)} Arises as a Linear Pure Birth Process | p. 288 |
References | p. 291 |
Case Studies | |
The Role of Mathematical Models in Explaining Recurrent Outbreaks of Infectious Childhood Diseases | p. 297 |
Introduction | p. 297 |
The SIR Model with Demographics | p. 300 |
Historical Development of Compartmental Models | p. 302 |
Early Models | p. 302 |
Stochasticity | p. 306 |
Seasonality | p. 306 |
Age Structure | p. 307 |
Alternative Assumptions About Incidence Terms | p. 307 |
Distribution of Latent and Infectious Period | p. 308 |
Seasonality Versus Nonseasonality | p. 308 |
Chaos | p. 309 |
Transitions Between Outbreak Patterns | p. 310 |
Spectral Analysis of Incidence Time Series | p. 310 |
Power Spectra | p. 311 |
Wavelet Power Spectra | p. 313 |
Conclusions | p. 314 |
References | p. 316 |
Modeling Influenza: Pandemics and Seasonal Epidemics | p. 321 |
Introduction | p. 321 |
A Basic Influenza Model | p. 322 |
Vaccination | p. 326 |
Antiviral Treatment | p. 330 |
A More Detailed Model | p. 334 |
A Model with Heterogeneous Mixing | p. 336 |
A Numerical Example | p. 341 |
Extensions and Other Types of Models | p. 345 |
References | p. 346 |
Mathematical Models of Influenza: The Role of Cross-Immunity, Quarantine and Age-Structure | p. 349 |
Introduction | p. 349 |
Basic Model | p. 351 |
Cross-Immunity and Quarantine | p. 354 |
Age-Structure | p. 359 |
Discussion and Future Work | p. 362 |
References | p. 363 |
A Comparative Analysis of Models for West Nile Virus | p. 365 |
Introduction: Epidemiological Modeling | p. 365 |
Case Study: West Nile Virus | p. 367 |
Minimalist Model | p. 368 |
The Question | p. 368 |
Model Scope and Scale | p. 368 |
Model Formulation | p. 370 |
Model Analysis | p. 372 |
Model Application | p. 373 |
Biological Assumptions 1: When does the Disease-Transmission Term Matter? | p. 374 |
Frequency Dependence | p. 374 |
Mass Action | p. 374 |
Numerical Values of R[subscript 0] | p. 377 |
Biological Assumptions 2: When do Added Model Classes Matter? | p. 377 |
Model Parameterization, Validation, and Comparison | p. 380 |
Model Application #1: WN Control | p. 381 |
Model Application #2: Seasonal Mosquito Population | p. 382 |
Summary | p. 384 |
References | p. 386 |
Suggested Exercises and Projects | p. 391 |
Cholera | p. 395 |
Ebola | p. 395 |
Gonorrhea | p. 395 |
HIV/AIDS | p. 396 |
HIV in Cuba | p. 396 |
Human Papalonoma Virus | p. 397 |
Influenza | p. 397 |
Malaria | p. 397 |
Measles | p. 398 |
Poliomyelitis (Polio) | p. 398 |
Severe Acute Respiratory Syndrome (SARS) | p. 399 |
Smallpox | p. 399 |
Tuberculosis | p. 400 |
West Nile Virus | p. 400 |
Yellow Fever in Senegal 2002 | p. 400 |
Index | p. 403 |
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