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My Healthy Community: Delaware Environmental Public Health Tracking Network
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Infectious Disease

Overview

Infectious diseases are caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful. But under certain conditions, some organisms may cause disease.

Some infectious diseases can be passed from person to person. Some are transmitted by insects or other animals. And you may get others by consuming contaminated food or water or being exposed to organisms in the environment. Many infectious diseases, such as COVID-19 and the Flu, can be prevented by vaccines.

Key Data and Reports

Infectious Disease in Delaware

Here, we highlight one key statistic from each topic. Click a table row to see more detailed data for the statistic. Or click on a link under "Topic Page" to view a statistic's corresponding topic page.

Table Key
Topic Page
Indicator

Delaware

% Change
Trendline
COVID-19

Average Daily COVID-19 Hospital Admissions

number of new admissions

1.6

(5/17/2025)
Decreased 16%(April 27, 2025 to May 11, 2025)

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Influenza

New Flu Cases

number of cases

28

(5/17/2025)
Decreased 52%(April 27, 2025 to May 11, 2025)

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Nationally Notifiable Conditions

Deaths Associated with Nationally Notifiable Infectious Conditions

number of people

123

(2021)
Increased 26%(2016 to 2021)

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Respiratory Syncytial Virus (RSV)

Total RSV Emergency Department Visits

number of visits

0

(9/13/2025)

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Hepatitis C

Hepatitis C as Underlying Cause of Death

number of people

40

(2021)
Decreased 22%(2016 to 2021)

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Sexually Transmitted Infections (STIs)

Chlamydia Cases

number of people

5,179

(2022)
Decreased 12%(2019 to 2022)

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Wastewater Surveillance

COVID-19 Wastewater Viral Activity Levels

viral activity level

6.0

(8/23/2025)
Increased 94%(August 3, 2025 to August 17, 2025)

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Values marked with

indicate there is insufficient data to respect the privacy of citizens.

Additional Information

Infectious Disease in Delaware

Data Sources

COVID-19 Hospitalizations

Citation: Delaware Department of Health and Social Services. https://myhealthycommunity.dhss.delaware.gov/

View or download this dataset
Emergency Department Burden from Respiratory Syncytial Virus (RSV)

Citation: Delaware Department of Health and Social Services. https://myhealthycommunity.dhss.delaware.gov/

View or download this dataset
Influenza Cases

Citation: Delaware Department of Health and Social Services. https://myhealthycommunity.dhss.delaware.gov/

View or download this dataset
Mortality

Citation: Delaware Department of Health and Social Services, Division of Public Health, Delaware Health Statistics Center.

View or download this dataset
Sexually Transmitted Diseases

Citation: https://www.dhss.delaware.gov/dhss/dph/dpc/stds.html

View or download this dataset
Wastewater Data

Citation: Centers for Disease Control and Prevention (CDC). National Wastewater Surveillance System (NWSS). https://www.cdc.gov/nwss/

View or download this dataset

Privacy

In releasing this information, Delaware aims to provide information that can be helpful to local communities as they work to improve public health. However, the protection of the confidentiality of our citizens is of paramount importance. To that end, counts of less than 11 are not presented. An outside expert has reviewed the platform to ensure it complies with the HIPAA privacy rule (45 CFR 164.§514(b)).