Williams County - January 6, 2021

Effective Reproduction Number (Rt)

A series of reporting gaps/lags beginning in mid-November creates some instability in estimates during that period.  However, the most recent data suggests an Rt spiking well above 1.0 in late November and early December.  Overall, Rt estimates have undulated substantially. Whether or not the recent upward trend will continue remains to be seen.


Projected Incidence

Because of the significant reporting gaps/lags described above, we modeled what the missing numbers most likely would have been during this period and project future cases over a two-week period based on a combination of these and more recent actual case numbers.  It is expected that the daily incidence may trend slightly downward in these coming weeks. Because these projections assume continued social mixing at levels seen in recent weeks, a post-holiday decline in mixing could portend lower-than-projected case levels.


Asymptomatic to Symptomatic Ratio

Data issues again complicate estimation, but the ratio of asymptomatic to symptomatic cases appears to have trended downward since the second week of December.  A low ratio of asymptomatic to symptomatic cases facilitates mitigation efforts.