Marin County Public Health tracks demographic, geographic, and clinical information about confirmed COVID-19 cases to inform the COVID-19 response and understand factors associated with COVID-19 transmission and clinical outcomes in our community. We are consistently improving our data collection, analysis, and sharing procedures, so will continue to add additional indicators to this report as data become available. In this report, you will find data for the following key indicators related to confirmed COVID-19 cases and testing:
- Cases, Hospitalizations, and Deaths by Date Reported
- Daily Cases and Persons Tested by Test Date
- Daily Number of People in a Marin Hospital or ICU with COVID-19
- Cases by Geographic Location
- Cases, Hospitalizations, and Deaths by Age and Gender
There are two main indicators of potential COVID-19 activity locally— the number of confirmed cases and the general number of people experiencing severe respiratory illness. Seeing important increases helps our healthcare providers and partners know when COVID-19 activity may be increasing in Marin. Marin County Public Health receives regular updates on cases of respiratory illness from all Marin County emergency departments (ED), and from Emergency Medical Services (EMS), our countywide 911 ambulance response system. We track these over time, and compare to prior years. Note there’s always ups and downs in our usual activity, and we’re looking for significant changes. Respiratory illness surveillance data are available on this webpage below the information reported for confirmed COVID-19 cases.
Information about confirmed cases is updated daily by approximately 5pm Pacific Standard Time (PST). Information about respiratory illness activity is updated biweekly each Tuesday and Friday.
Confirmed COVID-19 Cases
Data are provisional and subject to change.
Point-in-Time Information
Cumulative Information
*Recovered is currently defined as 14 days post-diagnosis with COVID-19 excluding deaths and those currently hospitalized.
Total Cases, Hospitalizations, and Deaths by Date Reported
The charts below are live and interactive. Hover over the chart with your cursor to see the total number reported each day and observe the daily increase in reported cases over time.
The figure above displays the total number of confirmed cases among Marin County residents by date the case was reported to Marin County Public Health. The first case was reported on March 8, 2020.
Daily Cases and Persons Tested by Date
When we talk about "flattening the curve," we look to the chart below to see if the number of people with confirmed COVID-19 out of total individuals tested is decreasing over time. The blue bars below denote persons who tested positive for COVID-19, while the grey bars denote persons who tested negative for COVID-19.
The chart above shows the total number of individuals who tested positive or negative for COVID-19 by the date their test was conducted. Note that dates closer to the current date are subject to change as we are still waiting for test results to come in.
Daily Hospital and ICU COVID-19 Cases, Marin County
The figure above shows the total number of individuals with COVID-19 who are hospitalized or in an intensive care unit (ICU) by day in Marin County Hospitals as of April 1, 2020, the earliest date for which data are available. Not all individuals hospitalized with COVID-19 are in the ICU, and the daily number of individuals hospitalized and in the ICU has decreased since April 1st.
Breakdowns of Confirmed Cases
Cases by Geographic Location
This map is live and interactive, click on each jurisdiction to view the number of cases. These numbers will update as new data become available.
The map above shows the number of confirmed COVID-19 cases by six geographic regions in Marin County: San Rafael, Novato, San Anselmo + Fairfax, West Marin, Central Marin, and Southern Marin (only communities with greater than 20,000 population are named separately). Click on the menu bar in the upper left hand corner to view the graph's legend. Note that the number of confirmed cases in a given community are reflective of testing. The most confirmed cases occur in regions with a higher population.
Cases, Hospitalizations, and Deaths by Age
The figure above displays the number of laboratory confirmed COVID-19 cases, hospitalizations, and deaths by age group. To date, the majority of confirmed cases and hospitalizations have occurred among individuals greater than 50 years of age and all reported deaths have been among those 65 years of age or older.
Cases, Hospitalizations, and Deaths by Gender
The figure above displays the percentage of laboratory confirmed COVID-19 cases, hospitalizations, and deaths by gender. The majority of confirmed cases, hospitalizations, and deaths have occurred among those who are male.
Cases, Hospitalizations, and Deaths by Race/Ethnicity
The figure above displays laboratory confirmed COVID-19 cases, hospitalizations, and deaths by race/ethnicity. The majority of confirmed cases, hospitalizations, and deaths have occurred among individuals who are of White, non-Hispanic; Hispanic; or Asian, non-Hispanic race/ethnicity.
Respiratory Illness Activity+
Common symptoms of COVID-19 include fever, cough, and difficulty breathing. Respiratory illness activity will capture visits that may be due to COVID-19 and influenza-like illnesses. The majority of individuals with COVID-19 will experience mild to moderate symptoms. However, some individuals may experience more severe symptoms and require a higher level of medical care through EMS or the ED. Tracking the total number of visits and those due to respiratory illnesses provides a situational awareness of current resource needs in our community. Each daily count below reflects 3-day rolling averages. Figures 1-3 display information on current trends in EMS calls and ED visits due to respiratory illnesses total and by age.
Utilization Trends: Over the past week, the number of ED and EMS visits and those due to respiratory illnesses have been lower than daily averages seen in January-April, 2019. Marin County Public Health will continue to monitor trends to identify any significant changes (Figures 1A-B).
Figures 1A-B: Number of Total Visits and Visits due to Respiratory Illnesses
Total Marin County Emergency Medical Services Calls (1A)
Figure 1A above is a stacked bar chart showing that the total number of EMS calls and those due to respiratory illnesses based on 3-day rolling averages. Over the past week, EMS calls have been below January to April 2019 averages.
Total Kaiser San Rafael, MarinHealth Medical Center and Novato Community Hospital Emergency Department Visits* (1B)
*Discharge data from Kaiser San Rafael, MarinHealth and Novato Community Hospital show trends in ED visits due to respiratory illnesses and are updated as soon as data are available.
Figure 1B above is a stacked bar chart showing that the total number of Kaiser San Rafael, MarinHealth and Novato Community Hospital ED visits and those due to respiratory illnesses based on 3-day rolling averages. ED visits are notably below January to April 2019 averages and less than half of daily visit levels seen in January and February of this year.
Percentage of visits due to respiratory illnesses: Approximately 5% of Emergency Medical Services (EMS) calls and 3% of Emergency Department (ED) visits were due to respiratory illnesses (Figures 2A-B).
Figures 2A-B: Daily Proportion of Visits due to Respiratory Illnesses
Percentage of Marin County Emergency Medical Services Calls (2A)
Figure 2A above is a line chart showing that the percentage of EMS calls due to respiratory illnesses recently decreased and remain similar to trends observed during this time in 2018 (dotted blue line) and 2019 (dashed black line).
Percentage of Kaiser San Rafael, MarinHealth Medical Center and Novato Community Hospital Emergency Department Visits* (2B)
*Discharge data from Kaiser San Rafael, MarinHealth and Novato Community Hospital show trends in ED visits due to respiratory illnesses and are updated as soon as data are available.
Figure 2B above is a line chart showing that the percentage of Kaiser San Rafael, MarinHealth, and Novato Community Hospital ED visits due to respiratory illnesses is decreasing and remains similar to trends observed during this time in 2018 (dotted black line) and 2019 (dashed black line).
Age Distribution of Respiratory Illness Visits: The majority of respiratory illness-related EMS calls occur among those 65 years and older, while the majority of ED visits due to respiratory illnesses occur among those less than 65 years of age (Figures 3A-B).
Figures 3A-B: Total Visits Daily due to Respiratory Illnesses by Age
Total Marin County Emergency Medical Services Calls by Age (3A)
Figure 3A above is a stacked bar chart showing the total number of EMS calls due to respiratory illnesses by age categories 0-18 years (blue), 19-64 years (gold), and 65 or more years (red). The majority of EMS calls due to respiratory illnesses occur among those 65 years or older. The total number of respiratory illness EMS calls based on 3-day rolling averages are somewhat below January to April 2019 averages.
Total Kaiser San Rafael, MarinHealth Medical Center and Novato Community Hospital Emergency Department Visits by Age* (3B)
*Discharge data from Kaiser San Rafael, MarinHealth and Novato Community Hospital show trends in ED visits due to respiratory illnesses and are updated as soon as data are available.
Figure 3B above is a stacked bar chart showing the total number of Kaiser San Rafael, MarinHealth, and Novato Community Hospital ED visits due to respiratory illnesses by age categories 0-18 years (blue), 19-64 years (gold), and 65 or more years (red). The majority of ED visits due to respiratory illnesses occur among those less than 65 years of age. The total number of respiratory illness ED visits based on 3-day rolling averages are below January to April 2019 averages.
National and Statewide COVID-19 Activity
Visit the California Department of Public Health's COVID-19 website for updates on activity statewide and the Centers for Disease Control and Prevention's website for information on nationwide activity.
+Definitions and Terminology
Respiratory illnesses are identified using free-text chief complaint and structure primary impression fields in routinely collected Emergency Medical Services and Emergency Department data. Visits that mention at least one of the following (including common misspellings) were classified as those due to respiratory illnesses for the purposes of routine surveillance: influenza-like illness, influenza, fever, shortness of breath (only if with fever or cough in ED), difficulty breathing, respiratory distress, pneumonia, cough (only if with fever or shortness of breath in ED), sore throat, wheezing, bronchitis.