${\mathit{C}}_i$	Actual infection count on day i
v[C${}_i$]	Range of new infection cases
${\mathit{n}}_t$	Trend observation window (number of terms in one moving average for trend)
${\mathit{n}}_c$	Count observation window (number of terms in one moving average for count)
w	Observation window (minimum number of days for which the count of new infections must increase)
$\delta$	Displacement gap
M	Marker
${\tau }_{up}$	Up-trigger
${\tau }_{dwn}$	Down-trigger
s	Spike
d	Drop
$\beta$	Decimal base shift
$\chi$SMA	Corrected single moving average
$\delta$DMA	Displaced double moving average