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For each California county, we extracted various demographics including the ISO 2 character label for the US or the Abbreviation for CA, population: population, area, population density, education, income, median age, political leaning, ethnicity. The demographics were obtained from the following sources for the US.

california-politics.csv

california-age.csv 

california-politics.csv

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• • Deaths are roughly linear with confirmed cases on a log scale
  • By March 24th the following counties were already observing deaths: Santa Clara (SCL), Riverside (RIV), San Jose (SJ), Sacramento (SAC), LA County, Orange County. 
  • By June 25th:
    • In terms of confirmed cases and deaths per 1 Million county population
      • The leading counties were Lake (LAK), Nevada (NEV), Mono (MNO) with Imperial (IMP) catching up since the end of May. 
      • These are followed by LA County (LA), Orange Country (OR), Kings County (KIN), Tuolumne (TUO) and Riverside (RIV).
    • If one just takes the number of cases (i.e. do not normalize by the population of the county) then:
      • The leading counties are LA County (LA), Orange County (OR), Lake County (LAK), Nevada County (Nevada), Riverside (RIV), San Diego County (SD) and San Bernadino County (SBD)
    • In general, the counties with lower per capita income appear to have lower numbers of confirmed cases and deaths, The exceptions are Lake County (LAK), Imperial County (IMP), Kern County (KER), Tuolumne County (TUO) and Fremont County (FRE).
  • By July 20:
    • LA county, Orange county (ORA), Lake, Riverside (RIV), San Diego (SD) and San Bernadino (SBD)  counties by July 20 had a clear lead in deaths and confirmed cases. 
    • By this time LA county had almost four times the deaths of the next highest (Orange) county and almost three times the confirmed cases.
    • The following counties still had zero deaths:

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• • • Imperial county with a population of 177K had 8606 cases and 163 deaths, this compares with El Dorado county with a population of 181K that had 443 cases and 0 deaths. One big difference is the % Hispanic population: 79.6% for Imperial county and 11.8% for El Dorado county.

    • The following were the leading counties in terms of deaths/population

      County	ID	Confirmed	Deaths	Population	Deaths/population	% Hispanic population
      Riverside	RIV	29983	588	2266899	0.000259	45%
      KIngs	KIN	3398	42	151390	0.000277	50.2%
      Tulare	TUL	6896	167	451108	0.000370	59.8%
      Los Angeles	LA	159045	4104	9974203	0.000411	47.5%
      Imperial	IMP	8606	163	177026	0.000921	79.6%

      It is seen that these leading counties also had large Hispanic populations. Graphs of the ratios confirmed cases/population and deaths/population against the percent of Hispanic population in each California county areshown are shown below, There are seen to be noticeable correlations (R²). The probability of a confirmed case is seen to be two to three times for counties with twice the percentage of Hispanic populations.
      
      

    • The following were the leading counties in terms of deaths/confirmed cases:

      County	ID	Deaths/confirmed %	Population	% Hispanic population
      Inyo	INY	2.5	18439	18.7%
      San Mateo	SM	2.5	739837	24.9%
      Los Angeles	LA	2.58	9974203	47.5%
      Mariposa	MPA	2.63	17946	9.4%
      Yolo	YOL	2.84	204162	29.8%
      Shasta	SHA	2.89	178520	8.3%