This report provides information about Covid-19 in Illinois counties as at April 11, 2020.  The report should be read together with the Research Brief, Vol. 2, No. 5 (2020, April 7),  hereon labeled the “original paper”; see
The original paper presented Covid-19 data, county-wise, as at April 8, 2020. Since then, in a span of three days, the virus has spread to seven more rural counties; Adams County in rural Illinois has replaced Christian County in the top three list of worst affected counties. In general, the daily, compound growth rate of the virus is either stable or declining.