A significant drop in the number of laboratory-confirmed cases during the latter half of the second wave is obvious in the epidemic curve
, and may have affected the strength of the measured association.
with single peak and moderate duration of about one month is suggestive of the common source outbreak of disease with incubation period of approximately 15 days to one month, which is a similar requisite for typhoid (11).
The epidemic curve
for Taiwan reveals the very rapid rise in cases resulting from the hospital outbreak.
We then estimated, using the existing epidemic curve
, the probability that a person who was vaccinated had not previously been infected with A(H1N1)pdm09 virus and had a clinical or subclinical case and the probability that a person would be infected during the remaining portion of the season.
Transmission season in Texas was April--December; the epidemic curve
peaked in August.
Cholera incubation varies from a few hours to 6 days (26), and the epidemic curve
strongly suggests a rapid decrease of the contamination level in the river because the number of new cases and deaths dropped dramatically after only 2 days.
These decreases are consistent with the decrease in the SINAVE epidemic curve
The time course of the reproduction number during an outbreak can be inferred from the epidemic curve
Although pandemic plans often describe action to be taken depending on features in the epidemic curve
We note the difficulty of making inferences directly from changes in epidemic curves
because changes in the epidemic curve
may lag behind changes in the underlying transmission dynamics by at least 1 serial interval, as has previously been shown for severe acute respiratory syndrome (9,11).
The estimated epidemic curve
identified 2 outbreak periods.