U.S. flag

An official website of the United States government

Government Website

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Safely connect using HTTPS

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

  1. Home
  2. About DHS
  3. Site Links
  4. Keywords
  5. Coronavirus (COVID-19)

Coronavirus (COVID-19)

Coronavirus (COVID-19)

Last Updated: | Publication

Determination of a National Emergency Requiring Actions to Protect the Safety of Americans Using and Employed by the Transportation System

As reflected in numerous determinations by the Executive Branch, including the President’s March 13, 2020 determination that the outbreak of Coronavirus Disease 2019 (COVID-19) constitutes a “national emergency” under the National Emergencies Act and the nationwide public health emergency declared by the Secretary of Health and Human Services on January 31, 2020, the COVID-19 pandemic continues to pose a threat to our health and security.

Last Updated: | Publication

Environmental Assessment of Proposed NYC Simulant Particle Releases for the Viral Phenomenology Program

The Department of Homeland Security (DHS) Science and Technology Directorate (S&T) plans to conduct a scientific study on aerosol behavior in New York City buses and subway trains. A special focus of the study will be tests of various methods to mitigate the potential spread of aerosols in buses and subway trains.

Last Updated: | Publication

Travel Risk Assessment

The DHS Office of Strategy, Policy, and Plans recently completed its evaluation and review of all currently travel restricted and 180-day warning countries.  Notably, this review included new recommendations to remove from travel restrictions certain countries that have demonstrated significant compliance improvement.

Last Updated: | Press Releases

Feature Article: S&T Joins Coalition Seeking to ‘Flush’ out COVID-19 in Wastewater

S&T is working with NIST and the University of Louisville to develop guidelines to standardize Wastewater-Based Epidemiology testing methods nationwide.

Last Updated: | Blog

What You Need to Know: COVID-19 Vaccination Program

Throughout the COVID-19 pandemic, the Centers for Disease Control and Prevention (CDC) has remained an authoritative source for information on COVID-19 information, including guidance about what to do if you are sick and ways you can help slow the spread of COVID-19. Please review CDC’s list of 8 Things to Know about the U.S. COVID-19 Vaccination Program.

Last Updated: | Blog

Following the Science: Securing the Nation’s Reopening and Recovery

In collaboration with our whole-of-government partners, this week at the Consumer Electronics Show (CES) S&T is hosting a series of virtual conversations that show how S&T is investing in new ideas and technologies to keep you safe.

Last Updated: | Publication

DHS COVID R&D Impacts: SXSW Overview

In the race to get the country back on track in the current COVID-19 era, the Department of Homeland Security Science and Technology Directorate (S&T) is leading a whole-of-government approach to build public-private innovation teams that incentivize and lower the risk for industry to co-invest in solutions to address nationwide problems and build resilience capacity.

Last Updated: | Publication

Road to Reopening: Recovery through Research Virtual Panel Discussion

DHS Science & Technology (S&T) is partnering with state, local and industry innovators to help communities mitigate risks and respond to the compounding pressures of natural disasters and the pandemic.

Last Updated: | Publication

S&T Evaluation of Disinfectant Efficacy Against SARS-CoV-2 Factsheet

This study was conducted to examine the efficacy of eight disinfectants that are representative of major classes of disinfectants found in liquid cleaners to reduce the viral load on contaminated surfaces.

Last Updated: | Blog

Staying Connected During the Holidays

The holiday season is usually a time of celebrations and joyous memory-making with friends, family, and colleagues. This year will be different for many people.