All graphs and tables are calculated at 10:30 AM/PM from data downloaded from COVID-19 in Iowa. I stream all data analysis and updating live on Twitch starting at 10:15 AM/PM everyday.
Graphed Infections Since 05/15/2020
% Iowans Infected by Day
% Currently Infected
This percentage is based on the number of active infections out of all residents of Polk.
12-Hour Positivity %
Cumulative Positivity %
According to the World Health Organization, countries/states/counties with extensive testing should be at a positivity of 5% or lower. A high positivity rate means that testing is revealing predominantly symptomatic positives and might be missing asymptomatic/subclinical positives. Positivity over a 12-hour period should return a similar positivity percentage, provided that enough testing is being done everyday.
Case Fatality Rate
Case Fatality Rate %
Hospitalizations by Day
This data is sourced from COVID-19 in Iowa in the PDF available below the graphs and table on the first page. It is normally out-dated by at least 2-4 days and is only updated by the state a few days each week. Unfortunately, the data is not as complete as Iowans deserve on the county level.
Polk 24-Hour Positivity
County positivity percentages over any given 24-hour period will fluctuate wildly in most counties. This effect is smoothed out by doing an average positivity calculation to see what trend line appears.
None to Minimal Community Transmission (0-5% 14-Day Rolling Average Positivity): At this level, schools are asked to continue on-site learning following public health guidance, or hybrid learning as necessary based on parent preference and student quarantine.
Minimal to Moderate Community Transmission (6-14% 14-Day Rolling Average Positivity): At this level, schools are asked to continue on-site learning following public health guidance, or hybrid learning as necessary based on parent preference and student quarantine, and limit some interactions.
14-Day Rolling Average Positivity
Polk 14-Day Rolling Average Positivity
Polk Dept of Education 14-Day Positivity
There is a large disparity between how the State of Iowa and how I arrive at the 14-day average positivity. The State appears to be back-dating positives to outside the 14-day window, whereas I report positivity based on when positives and tests are reported to the Iowan public.
Substantial Controlled Community Transmission (15-20% 14-Day Rolling Average Positivity): Schools are asked to follow hybrid learning plans as necessary based on parent preference and student quarantine. Schools that also have 10% absenteeism among students can request the Department of Education to transition to continuous remote learning for up to 14 days.
Substantial Uncontrolled Community Transmission (>20% 14-Day Rolling Average Positivity): Schools can request the Department of Education to transition to continuous remote learning for up to 14 days.