" Familiar as the voice of the mind is to each, the highest merit we ascribe to Moses, Plato and Milton is that they set at naught books and traditions, and spoke not what men, but what they thought."
He continually dipped into the money he had earned from his books and even his wife's family inheritance to keep the dying machine afloat, but it was all for naught.
So we often define R at the start of the outbreak, when nearly everyone is in the susceptible group, and we call it the basic reproductive number or R naught.
Outbreaks happen when R naught is greater than one, that is, when each infected person can infect more than one person, making the number of infected people increase over time.
A ghastly putrefaction has attacked already the living man; the worms of the grave, the piteous horror of mortality, and the darkness before him offer naught but fear.