Estimated effects of projected climate change on the

basic reproductive number of the Lyme disease vector Ixodes scapularis.

These measured exposure results were then used to calculate the probability of getting infected and the basic reproductive number in order to evaluate the protective effectiveness of the air delivery system.

The number of secondary cases is also called the basic reproductive number ([R.

When the exposure period is increased to 3 days, when air is not supplied to the environment, two secondary cases can be produced with a single index case, but with an increase of supply flow rate to 3 ACH, the basic reproductive number is reduced below 1.

Further increase of air supply flow rate to 9 ACH reduces the basic reproductive number to one, indicating that an endemic state is reached.

At the beginning of an epidemic, this number is expressed mathematically as the

basic reproductive number, [R.

We used uncertainty and sensitivity analysis of the basic reproductive number [R.

The basic reproductive number derived from our model (10) is given by the formula

We carried out an uncertainty analysis on the basic reproductive number ([R.

An extended definition for the transmission rate ([beta]) is the number of persons infected per infectious person per day while the basic reproductive number ([R.

4 days as the generation time of a SARS infection, as estimated from the mean serial interval between the time from onset of symptoms in index patient to onset of symptoms in secondary case-patient in Singapore (9), we estimated the

basic reproductive number of SARS infections, [R.