Effective Reproduction Number (Rt)
The most recent data suggests an Rt above 1.0 in the first half of January, but returning to levels below 1.0 for the remainder of the month.
Daily incidence appears likely to continue to decline gradually in the coming two weeks. Continued masking and social distancing will be critical to maintaining this momentum.
Asymptomatic to Symptomatic Ratio
The ratio of asymptomatic to symptomatic cases appears to have remained largely stable at a relatively low level during the second half of January. A low ratio of asymptomatic to symptomatic cases facilitates mitigation efforts since symptomatic individuals usually isolate.