Note: the initial values S = 45400, etc. that we used in the text do not apply here.
S'?
S-I-R model for a measles-like
illness that lasts for 4 days. It is also known that a typical
susceptible person meets only about 0.3% of infected population each
day, and the infection is transmitted in only one contact out of six.
S-I-R model for a measles-like illness:
S--below which the number of infected
will only decline--can be expressed in terms of the transmission
coefficient a and the recovery coefficient b. What is that
expression?
a;
assume they differ only in the length of time someone stays ill. Which
one has the lower threshold level for S? Explain your reasoning.